/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:21:02,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:21:02,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:21:02,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:21:02,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:21:02,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:21:02,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:21:02,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:21:02,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:21:02,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:21:02,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:21:02,410 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:21:02,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:21:02,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:21:02,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:21:02,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:21:02,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:21:02,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:21:02,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:21:02,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:21:02,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:21:02,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:21:02,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:21:02,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:21:02,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:21:02,722 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:21:02,723 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:21:02,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2021-07-09 17:21:02,723 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2021-07-09 17:21:02,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:21:02,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:21:02,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:21:02,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:21:02,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:21:02,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:21:02,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:21:02,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:21:02,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:21:02,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... [2021-07-09 17:21:02,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:21:02,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:21:02,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:21:02,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:21:02,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:21:02,828 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:21:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:21:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:21:02,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:21:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:21:02,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:21:02,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:21:02,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:21:02,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:21:02,830 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:21:02,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:21:02,981 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 17:21:02,981 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 17:21:02,982 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:21:02 BoogieIcfgContainer [2021-07-09 17:21:02,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:21:02,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:21:02,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:21:02,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:21:02,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:21:02" (1/2) ... [2021-07-09 17:21:02,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65d6b144 and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:21:02, skipping insertion in model container [2021-07-09 17:21:02,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:21:02" (2/2) ... [2021-07-09 17:21:02,987 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2021-07-09 17:21:02,991 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:21:02,991 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:21:02,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:21:02,991 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:21:03,010 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:21:03,024 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:21:03,035 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:21:03,036 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:21:03,036 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:21:03,036 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:21:03,036 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:21:03,036 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:21:03,036 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:21:03,036 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:21:03,058 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-07-09 17:21:03,066 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:21:03,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:03,086 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:03,087 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1485035801, now seen corresponding path program 1 times [2021-07-09 17:21:03,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:03,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450931977] [2021-07-09 17:21:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:03,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:03,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450931977] [2021-07-09 17:21:03,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450931977] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:03,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:03,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:03,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645938899] [2021-07-09 17:21:03,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:03,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:03,316 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:03,353 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-07-09 17:21:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:21:03,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 17:21:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:03,373 INFO L225 Difference]: With dead ends: 26 [2021-07-09 17:21:03,373 INFO L226 Difference]: Without dead ends: 18 [2021-07-09 17:21:03,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-09 17:21:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-09 17:21:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-07-09 17:21:03,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-07-09 17:21:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:03,406 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-07-09 17:21:03,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-07-09 17:21:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-09 17:21:03,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:03,407 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:03,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:21:03,407 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -258877683, now seen corresponding path program 2 times [2021-07-09 17:21:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:03,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068550600] [2021-07-09 17:21:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:03,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:03,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068550600] [2021-07-09 17:21:03,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068550600] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:03,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:03,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365572987] [2021-07-09 17:21:03,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:03,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:03,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:03,484 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:03,514 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-09 17:21:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:21:03,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-09 17:21:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:03,516 INFO L225 Difference]: With dead ends: 28 [2021-07-09 17:21:03,516 INFO L226 Difference]: Without dead ends: 23 [2021-07-09 17:21:03,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-07-09 17:21:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-07-09 17:21:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-09 17:21:03,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-09 17:21:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:03,521 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-09 17:21:03,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-09 17:21:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:03,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:03,522 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:03,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:21:03,522 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:03,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2042651181, now seen corresponding path program 1 times [2021-07-09 17:21:03,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:03,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990664887] [2021-07-09 17:21:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:03,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:03,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990664887] [2021-07-09 17:21:03,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990664887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:03,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902799662] [2021-07-09 17:21:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:21:03,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:03,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:21:03,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:03,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:03,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:03,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 17:21:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:03,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902799662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:03,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:03,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:21:03,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763845093] [2021-07-09 17:21:03,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:03,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:03,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:03,898 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:03,942 INFO L93 Difference]: Finished difference Result 32 states and 58 transitions. [2021-07-09 17:21:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:21:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:03,944 INFO L225 Difference]: With dead ends: 32 [2021-07-09 17:21:03,944 INFO L226 Difference]: Without dead ends: 27 [2021-07-09 17:21:03,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-07-09 17:21:03,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-07-09 17:21:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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) [2021-07-09 17:21:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 46 transitions. [2021-07-09 17:21:03,948 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 46 transitions. Word has length 11 [2021-07-09 17:21:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:03,948 INFO L482 AbstractCegarLoop]: Abstraction has 25 states and 46 transitions. [2021-07-09 17:21:03,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2021-07-09 17:21:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:03,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:03,949 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:04,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 17:21:04,172 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:04,172 INFO L82 PathProgramCache]: Analyzing trace with hash -413298669, now seen corresponding path program 2 times [2021-07-09 17:21:04,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644803235] [2021-07-09 17:21:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:04,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:04,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644803235] [2021-07-09 17:21:04,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644803235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:04,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998702638] [2021-07-09 17:21:04,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:04,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:04,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:21:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 17:21:04,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:04,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:04,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:04,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 17:21:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:04,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998702638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:04,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:04,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:21:04,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132370965] [2021-07-09 17:21:04,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:04,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:04,325 INFO L87 Difference]: Start difference. First operand 25 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-07-09 17:21:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:04,381 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-07-09 17:21:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:04,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 11 [2021-07-09 17:21:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:04,384 INFO L225 Difference]: With dead ends: 43 [2021-07-09 17:21:04,384 INFO L226 Difference]: Without dead ends: 38 [2021-07-09 17:21:04,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:04,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-07-09 17:21:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-07-09 17:21:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2021-07-09 17:21:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-07-09 17:21:04,393 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-07-09 17:21:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:04,393 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-07-09 17:21:04,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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) [2021-07-09 17:21:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-07-09 17:21:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:21:04,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:04,395 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:04,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:04,617 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2049322798, now seen corresponding path program 1 times [2021-07-09 17:21:04,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:04,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6848992] [2021-07-09 17:21:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:04,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6848992] [2021-07-09 17:21:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6848992] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:04,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:04,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:21:04,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246570338] [2021-07-09 17:21:04,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:21:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:21:04,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:21:04,641 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:04,653 INFO L93 Difference]: Finished difference Result 30 states and 55 transitions. [2021-07-09 17:21:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:21:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 17:21:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:04,654 INFO L225 Difference]: With dead ends: 30 [2021-07-09 17:21:04,654 INFO L226 Difference]: Without dead ends: 30 [2021-07-09 17:21:04,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:21:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-07-09 17:21:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-07-09 17:21:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-07-09 17:21:04,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-07-09 17:21:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:04,657 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-07-09 17:21:04,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-07-09 17:21:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:04,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:04,657 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:04,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:21:04,657 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash 268202073, now seen corresponding path program 3 times [2021-07-09 17:21:04,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:04,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926489346] [2021-07-09 17:21:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:04,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926489346] [2021-07-09 17:21:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926489346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:04,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305763181] [2021-07-09 17:21:04,679 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:21:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:04,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305763181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:04,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:04,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261377622] [2021-07-09 17:21:04,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:04,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:04,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:04,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:04,758 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:04,790 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2021-07-09 17:21:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:04,792 INFO L225 Difference]: With dead ends: 51 [2021-07-09 17:21:04,792 INFO L226 Difference]: Without dead ends: 51 [2021-07-09 17:21:04,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-09 17:21:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2021-07-09 17:21:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 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) [2021-07-09 17:21:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 54 transitions. [2021-07-09 17:21:04,806 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 54 transitions. Word has length 12 [2021-07-09 17:21:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:04,806 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 54 transitions. [2021-07-09 17:21:04,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:04,806 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 54 transitions. [2021-07-09 17:21:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:04,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:04,807 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:05,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:05,025 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1927934254, now seen corresponding path program 1 times [2021-07-09 17:21:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:05,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959428928] [2021-07-09 17:21:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:05,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959428928] [2021-07-09 17:21:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959428928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682393679] [2021-07-09 17:21:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682393679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:05,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:05,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:05,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38004470] [2021-07-09 17:21:05,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:05,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:05,096 INFO L87 Difference]: Start difference. First operand 28 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:05,139 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2021-07-09 17:21:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:05,140 INFO L225 Difference]: With dead ends: 57 [2021-07-09 17:21:05,140 INFO L226 Difference]: Without dead ends: 54 [2021-07-09 17:21:05,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-07-09 17:21:05,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2021-07-09 17:21:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-07-09 17:21:05,142 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 12 [2021-07-09 17:21:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:05,143 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-07-09 17:21:05,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-07-09 17:21:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:05,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:05,143 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:05,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:05,360 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1897554585, now seen corresponding path program 4 times [2021-07-09 17:21:05,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:05,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645144672] [2021-07-09 17:21:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:05,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:05,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645144672] [2021-07-09 17:21:05,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645144672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:05,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98863883] [2021-07-09 17:21:05,383 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 [2021-07-09 17:21:05,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98863883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:05,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:05,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106933399] [2021-07-09 17:21:05,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:05,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:05,497 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:05,535 INFO L93 Difference]: Finished difference Result 43 states and 76 transitions. [2021-07-09 17:21:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:05,536 INFO L225 Difference]: With dead ends: 43 [2021-07-09 17:21:05,536 INFO L226 Difference]: Without dead ends: 41 [2021-07-09 17:21:05,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-09 17:21:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-07-09 17:21:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 62 transitions. [2021-07-09 17:21:05,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 62 transitions. Word has length 12 [2021-07-09 17:21:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:05,539 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 62 transitions. [2021-07-09 17:21:05,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 62 transitions. [2021-07-09 17:21:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:05,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:05,539 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:05,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:21:05,757 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash 261530456, now seen corresponding path program 2 times [2021-07-09 17:21:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397938675] [2021-07-09 17:21:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:05,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397938675] [2021-07-09 17:21:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397938675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113867678] [2021-07-09 17:21:05,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:05,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:05,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113867678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:05,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:05,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:05,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387307085] [2021-07-09 17:21:05,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:05,829 INFO L87 Difference]: Start difference. First operand 32 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:05,856 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2021-07-09 17:21:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:05,857 INFO L225 Difference]: With dead ends: 45 [2021-07-09 17:21:05,857 INFO L226 Difference]: Without dead ends: 45 [2021-07-09 17:21:05,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-09 17:21:05,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-07-09 17:21:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-07-09 17:21:05,859 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-07-09 17:21:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:05,859 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-07-09 17:21:05,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-07-09 17:21:05,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:05,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:05,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:06,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:06,077 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash -905381939, now seen corresponding path program 5 times [2021-07-09 17:21:06,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:06,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23649092] [2021-07-09 17:21:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:06,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23649092] [2021-07-09 17:21:06,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23649092] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:21:06,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:21:06,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:21:06,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051918450] [2021-07-09 17:21:06,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:21:06,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:21:06,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:06,098 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:06,110 INFO L93 Difference]: Finished difference Result 33 states and 59 transitions. [2021-07-09 17:21:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:21:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 17:21:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:06,111 INFO L225 Difference]: With dead ends: 33 [2021-07-09 17:21:06,111 INFO L226 Difference]: Without dead ends: 29 [2021-07-09 17:21:06,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:21:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-09 17:21:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-07-09 17:21:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 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) [2021-07-09 17:21:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-09 17:21:06,113 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-09 17:21:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:06,113 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-09 17:21:06,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-09 17:21:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 17:21:06,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:06,113 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:06,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 17:21:06,114 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1796703570, now seen corresponding path program 3 times [2021-07-09 17:21:06,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:06,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124559924] [2021-07-09 17:21:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:06,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124559924] [2021-07-09 17:21:06,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124559924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:06,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739706961] [2021-07-09 17:21:06,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:06,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 17:21:06,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739706961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:06,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:06,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 17:21:06,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089141305] [2021-07-09 17:21:06,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:21:06,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:06,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:21:06,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:21:06,220 INFO L87 Difference]: Start difference. First operand 29 states and 54 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) [2021-07-09 17:21:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:06,248 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-07-09 17:21:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:06,249 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 12 [2021-07-09 17:21:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:06,249 INFO L225 Difference]: With dead ends: 40 [2021-07-09 17:21:06,249 INFO L226 Difference]: Without dead ends: 40 [2021-07-09 17:21:06,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-09 17:21:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-07-09 17:21:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-07-09 17:21:06,251 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 12 [2021-07-09 17:21:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:06,251 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-07-09 17:21:06,251 INFO L483 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) [2021-07-09 17:21:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-07-09 17:21:06,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:06,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:06,252 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:06,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:21:06,469 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash 549941096, now seen corresponding path program 4 times [2021-07-09 17:21:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:06,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029948123] [2021-07-09 17:21:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:06,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029948123] [2021-07-09 17:21:06,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029948123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:06,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887771583] [2021-07-09 17:21:06,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:06,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:06,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:06,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:06,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:06,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:06,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:06,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:06,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:06,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887771583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:06,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:06,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455175987] [2021-07-09 17:21:06,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:06,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:06,658 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:06,735 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2021-07-09 17:21:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:06,736 INFO L225 Difference]: With dead ends: 48 [2021-07-09 17:21:06,736 INFO L226 Difference]: Without dead ends: 38 [2021-07-09 17:21:06,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-07-09 17:21:06,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-07-09 17:21:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 67 transitions. [2021-07-09 17:21:06,738 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 67 transitions. Word has length 13 [2021-07-09 17:21:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:06,738 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 67 transitions. [2021-07-09 17:21:06,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 67 transitions. [2021-07-09 17:21:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:06,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:06,739 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:06,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:21:06,957 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1116462702, now seen corresponding path program 5 times [2021-07-09 17:21:06,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:06,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332774254] [2021-07-09 17:21:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:07,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:07,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332774254] [2021-07-09 17:21:07,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332774254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:07,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555214855] [2021-07-09 17:21:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:07,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:07,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:07,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:07,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:07,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:07,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:07,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:07,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:07,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:07,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555214855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:07,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:07,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:07,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627910372] [2021-07-09 17:21:07,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:07,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:07,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:07,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:07,168 INFO L87 Difference]: Start difference. First operand 35 states and 67 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:07,269 INFO L93 Difference]: Finished difference Result 59 states and 114 transitions. [2021-07-09 17:21:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:07,270 INFO L225 Difference]: With dead ends: 59 [2021-07-09 17:21:07,270 INFO L226 Difference]: Without dead ends: 45 [2021-07-09 17:21:07,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-09 17:21:07,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-07-09 17:21:07,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-07-09 17:21:07,272 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-07-09 17:21:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:07,273 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-07-09 17:21:07,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-07-09 17:21:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:07,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:07,273 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:07,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:21:07,490 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:07,490 INFO L82 PathProgramCache]: Analyzing trace with hash -257588172, now seen corresponding path program 6 times [2021-07-09 17:21:07,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:07,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598575518] [2021-07-09 17:21:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:07,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598575518] [2021-07-09 17:21:07,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598575518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103103196] [2021-07-09 17:21:07,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:07,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:07,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:07,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:07,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:07,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-07-09 17:21:07,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:07,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:07,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:07,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:07,680 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:07,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:07,680 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-07-09 17:21:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:07,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103103196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:07,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:07,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:07,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769918072] [2021-07-09 17:21:07,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:07,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:07,704 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:07,792 INFO L93 Difference]: Finished difference Result 76 states and 152 transitions. [2021-07-09 17:21:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:07,793 INFO L225 Difference]: With dead ends: 76 [2021-07-09 17:21:07,793 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 17:21:07,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 17:21:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2021-07-09 17:21:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-07-09 17:21:07,795 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 13 [2021-07-09 17:21:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:07,795 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-07-09 17:21:07,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-07-09 17:21:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:07,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:07,796 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:08,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:08,013 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1120270568, now seen corresponding path program 7 times [2021-07-09 17:21:08,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:08,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698479845] [2021-07-09 17:21:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:08,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:08,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698479845] [2021-07-09 17:21:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698479845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:08,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000952591] [2021-07-09 17:21:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:08,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:08,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:08,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:08,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:08,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:08,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:08,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000952591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:08,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:08,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:08,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291576686] [2021-07-09 17:21:08,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:08,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:08,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:08,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:08,176 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:08,270 INFO L93 Difference]: Finished difference Result 61 states and 123 transitions. [2021-07-09 17:21:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:08,271 INFO L225 Difference]: With dead ends: 61 [2021-07-09 17:21:08,271 INFO L226 Difference]: Without dead ends: 47 [2021-07-09 17:21:08,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-09 17:21:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-07-09 17:21:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 95 transitions. [2021-07-09 17:21:08,273 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 95 transitions. Word has length 13 [2021-07-09 17:21:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:08,273 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 95 transitions. [2021-07-09 17:21:08,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 95 transitions. [2021-07-09 17:21:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:08,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:08,273 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:08,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:21:08,490 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:08,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1979145098, now seen corresponding path program 8 times [2021-07-09 17:21:08,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:08,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611914180] [2021-07-09 17:21:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:08,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611914180] [2021-07-09 17:21:08,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611914180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771149534] [2021-07-09 17:21:08,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:21:08,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:08,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:08,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:08,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-07-09 17:21:08,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:08,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:08,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:08,691 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:08,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:08,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-07-09 17:21:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:08,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771149534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:08,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:08,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:08,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836740707] [2021-07-09 17:21:08,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:08,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:08,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:08,717 INFO L87 Difference]: Start difference. First operand 43 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:08,838 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-07-09 17:21:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:08,839 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:21:08,839 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 17:21:08,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 17:21:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-07-09 17:21:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-07-09 17:21:08,842 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-07-09 17:21:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:08,842 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-07-09 17:21:08,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-07-09 17:21:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:08,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:08,842 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:09,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:21:09,060 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:09,060 INFO L82 PathProgramCache]: Analyzing trace with hash -605208890, now seen corresponding path program 9 times [2021-07-09 17:21:09,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:09,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255139666] [2021-07-09 17:21:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:09,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:09,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255139666] [2021-07-09 17:21:09,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255139666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:09,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951311135] [2021-07-09 17:21:09,101 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:09,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:09,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:09,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-07-09 17:21:09,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:09,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:09,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:09,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:09,221 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:09,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:09,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-07-09 17:21:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951311135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:09,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:09,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:09,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034603837] [2021-07-09 17:21:09,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:09,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:09,243 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:09,366 INFO L93 Difference]: Finished difference Result 64 states and 135 transitions. [2021-07-09 17:21:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:09,367 INFO L225 Difference]: With dead ends: 64 [2021-07-09 17:21:09,367 INFO L226 Difference]: Without dead ends: 59 [2021-07-09 17:21:09,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-09 17:21:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2021-07-09 17:21:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 42 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 94 transitions. [2021-07-09 17:21:09,369 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 94 transitions. Word has length 13 [2021-07-09 17:21:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:09,369 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 94 transitions. [2021-07-09 17:21:09,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 94 transitions. [2021-07-09 17:21:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:09,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:09,370 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:09,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:21:09,586 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:09,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1739525202, now seen corresponding path program 10 times [2021-07-09 17:21:09,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:09,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645695686] [2021-07-09 17:21:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:09,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645695686] [2021-07-09 17:21:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645695686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:09,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884135231] [2021-07-09 17:21:09,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:09,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:09,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:09,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:09,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:09,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:09,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:09,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:09,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:09,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-09 17:21:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:09,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884135231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:09,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:09,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:09,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663084340] [2021-07-09 17:21:09,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:09,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:09,753 INFO L87 Difference]: Start difference. First operand 43 states and 94 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:09,848 INFO L93 Difference]: Finished difference Result 67 states and 142 transitions. [2021-07-09 17:21:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:09,849 INFO L225 Difference]: With dead ends: 67 [2021-07-09 17:21:09,849 INFO L226 Difference]: Without dead ends: 53 [2021-07-09 17:21:09,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-07-09 17:21:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-07-09 17:21:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-07-09 17:21:09,851 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-07-09 17:21:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:09,851 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-07-09 17:21:09,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-07-09 17:21:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:09,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:09,852 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:10,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:10,072 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1696567564, now seen corresponding path program 11 times [2021-07-09 17:21:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:10,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426617875] [2021-07-09 17:21:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:10,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:10,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426617875] [2021-07-09 17:21:10,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426617875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:10,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691511029] [2021-07-09 17:21:10,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:10,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:10,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:10,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:10,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:10,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:10,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-07-09 17:21:10,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:10,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:10,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:10,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:10,244 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:10,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:10,245 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-07-09 17:21:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:10,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691511029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:10,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:10,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:10,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469185760] [2021-07-09 17:21:10,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:10,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:10,269 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:10,444 INFO L93 Difference]: Finished difference Result 89 states and 192 transitions. [2021-07-09 17:21:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:10,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:10,445 INFO L225 Difference]: With dead ends: 89 [2021-07-09 17:21:10,445 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 17:21:10,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 17:21:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 48. [2021-07-09 17:21:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-07-09 17:21:10,449 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-07-09 17:21:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:10,449 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-07-09 17:21:10,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-07-09 17:21:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:10,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:10,450 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:10,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:21:10,667 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash 14045744, now seen corresponding path program 12 times [2021-07-09 17:21:10,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:10,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335870751] [2021-07-09 17:21:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:10,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:10,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335870751] [2021-07-09 17:21:10,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335870751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:10,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889378393] [2021-07-09 17:21:10,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:10,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:21:10,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:10,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:10,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-07-09 17:21:10,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:10,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:10,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:10,822 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:10,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:10,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-07-09 17:21:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:10,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889378393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:10,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:10,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:10,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712928147] [2021-07-09 17:21:10,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:10,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:10,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:10,844 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:10,987 INFO L93 Difference]: Finished difference Result 72 states and 158 transitions. [2021-07-09 17:21:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:10,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:10,987 INFO L225 Difference]: With dead ends: 72 [2021-07-09 17:21:10,987 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 17:21:10,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 17:21:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2021-07-09 17:21:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 47 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 111 transitions. [2021-07-09 17:21:10,989 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 111 transitions. Word has length 13 [2021-07-09 17:21:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:10,990 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 111 transitions. [2021-07-09 17:21:10,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 111 transitions. [2021-07-09 17:21:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 17:21:10,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:10,990 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:11,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:11,207 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:11,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1503450740, now seen corresponding path program 13 times [2021-07-09 17:21:11,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:11,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245046272] [2021-07-09 17:21:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:11,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:11,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245046272] [2021-07-09 17:21:11,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245046272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:11,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775952722] [2021-07-09 17:21:11,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:21:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:11,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:11,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 37 [2021-07-09 17:21:11,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:11,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:11,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-09 17:21:11,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:11,381 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:11,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:11,381 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:15 [2021-07-09 17:21:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:11,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775952722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:11,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:11,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005764118] [2021-07-09 17:21:11,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:11,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:11,406 INFO L87 Difference]: Start difference. First operand 48 states and 111 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:11,590 INFO L93 Difference]: Finished difference Result 77 states and 171 transitions. [2021-07-09 17:21:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 17:21:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:11,592 INFO L225 Difference]: With dead ends: 77 [2021-07-09 17:21:11,593 INFO L226 Difference]: Without dead ends: 72 [2021-07-09 17:21:11,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:21:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-09 17:21:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-07-09 17:21:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-07-09 17:21:11,595 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 13 [2021-07-09 17:21:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:11,595 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-07-09 17:21:11,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-07-09 17:21:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:11,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:11,598 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:11,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:11,815 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 781826158, now seen corresponding path program 14 times [2021-07-09 17:21:11,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:11,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109998729] [2021-07-09 17:21:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:11,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109998729] [2021-07-09 17:21:11,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109998729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:11,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855800587] [2021-07-09 17:21:11,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:11,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:11,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:11,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:11,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:11,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:11,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:11,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:11,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855800587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:11,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:11,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:11,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36019158] [2021-07-09 17:21:11,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:11,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:11,990 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:12,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:12,105 INFO L93 Difference]: Finished difference Result 68 states and 151 transitions. [2021-07-09 17:21:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:12,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:12,106 INFO L225 Difference]: With dead ends: 68 [2021-07-09 17:21:12,106 INFO L226 Difference]: Without dead ends: 63 [2021-07-09 17:21:12,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-07-09 17:21:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-07-09 17:21:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-07-09 17:21:12,108 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-07-09 17:21:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:12,108 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-07-09 17:21:12,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-07-09 17:21:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:12,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:12,109 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:12,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 17:21:12,325 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1352155630, now seen corresponding path program 15 times [2021-07-09 17:21:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:12,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331806290] [2021-07-09 17:21:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:12,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331806290] [2021-07-09 17:21:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331806290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:12,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148161320] [2021-07-09 17:21:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:12,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:12,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:12,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:12,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:12,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:12,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:12,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:12,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:12,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:12,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148161320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:12,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:12,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:12,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653928770] [2021-07-09 17:21:12,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:12,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:12,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:12,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:12,516 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:12,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:12,634 INFO L93 Difference]: Finished difference Result 91 states and 189 transitions. [2021-07-09 17:21:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:12,635 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:21:12,635 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:21:12,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:21:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2021-07-09 17:21:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.327272727272727) internal successors, (128), 55 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 128 transitions. [2021-07-09 17:21:12,637 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 128 transitions. Word has length 14 [2021-07-09 17:21:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:12,637 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 128 transitions. [2021-07-09 17:21:12,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 128 transitions. [2021-07-09 17:21:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:12,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:12,638 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:12,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:12,854 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash -373323828, now seen corresponding path program 16 times [2021-07-09 17:21:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:12,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601998127] [2021-07-09 17:21:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:12,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601998127] [2021-07-09 17:21:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601998127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270921691] [2021-07-09 17:21:12,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:12,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:12,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:12,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:12,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:12,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:13,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:13,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:13,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:13,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:13,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270921691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:13,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:13,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917435664] [2021-07-09 17:21:13,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:13,009 INFO L87 Difference]: Start difference. First operand 56 states and 128 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:13,151 INFO L93 Difference]: Finished difference Result 91 states and 193 transitions. [2021-07-09 17:21:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:21:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:13,152 INFO L225 Difference]: With dead ends: 91 [2021-07-09 17:21:13,152 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 17:21:13,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 17:21:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-07-09 17:21:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-07-09 17:21:13,154 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 14 [2021-07-09 17:21:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:13,154 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-07-09 17:21:13,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-07-09 17:21:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:13,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:13,154 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:13,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:21:13,371 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2009347957, now seen corresponding path program 17 times [2021-07-09 17:21:13,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:13,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209158931] [2021-07-09 17:21:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:13,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209158931] [2021-07-09 17:21:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209158931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:13,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556118379] [2021-07-09 17:21:13,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:13,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:13,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:21:13,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:13,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556118379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:13,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:13,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:21:13,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736635731] [2021-07-09 17:21:13,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:13,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:13,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:13,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:13,457 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:13,503 INFO L93 Difference]: Finished difference Result 121 states and 238 transitions. [2021-07-09 17:21:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:13,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:13,504 INFO L225 Difference]: With dead ends: 121 [2021-07-09 17:21:13,504 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:21:13,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:21:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 62. [2021-07-09 17:21:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-07-09 17:21:13,506 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-07-09 17:21:13,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:13,506 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-07-09 17:21:13,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,506 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-07-09 17:21:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:13,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:13,506 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:13,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:13,723 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:13,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:13,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1971410264, now seen corresponding path program 18 times [2021-07-09 17:21:13,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:13,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576954003] [2021-07-09 17:21:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:13,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576954003] [2021-07-09 17:21:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576954003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955569674] [2021-07-09 17:21:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:13,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:13,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:13,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:13,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:13,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:13,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:13,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:13,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:13,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955569674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:13,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:13,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:13,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24627196] [2021-07-09 17:21:13,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:13,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:13,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:13,893 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:13,989 INFO L93 Difference]: Finished difference Result 85 states and 189 transitions. [2021-07-09 17:21:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:13,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:13,990 INFO L225 Difference]: With dead ends: 85 [2021-07-09 17:21:13,990 INFO L226 Difference]: Without dead ends: 80 [2021-07-09 17:21:13,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-09 17:21:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-07-09 17:21:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-07-09 17:21:13,992 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-07-09 17:21:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:13,992 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-07-09 17:21:13,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-07-09 17:21:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:13,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:13,993 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:14,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:14,210 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash 245930806, now seen corresponding path program 19 times [2021-07-09 17:21:14,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:14,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945385426] [2021-07-09 17:21:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:14,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945385426] [2021-07-09 17:21:14,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945385426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:14,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589325109] [2021-07-09 17:21:14,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:14,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:14,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:14,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:14,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:14,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:14,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589325109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:14,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:14,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109242115] [2021-07-09 17:21:14,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:14,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:14,381 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:14,484 INFO L93 Difference]: Finished difference Result 88 states and 187 transitions. [2021-07-09 17:21:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:14,485 INFO L225 Difference]: With dead ends: 88 [2021-07-09 17:21:14,485 INFO L226 Difference]: Without dead ends: 83 [2021-07-09 17:21:14,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-09 17:21:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2021-07-09 17:21:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-07-09 17:21:14,487 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-07-09 17:21:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:14,487 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-07-09 17:21:14,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-07-09 17:21:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:14,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:14,487 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:14,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 17:21:14,706 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1735335802, now seen corresponding path program 20 times [2021-07-09 17:21:14,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:14,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598326561] [2021-07-09 17:21:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598326561] [2021-07-09 17:21:14,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598326561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:14,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322806230] [2021-07-09 17:21:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:14,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:14,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:14,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:14,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:14,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:14,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:14,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:14,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322806230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:14,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:14,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:14,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92962013] [2021-07-09 17:21:14,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:14,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:14,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:14,893 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:15,012 INFO L93 Difference]: Finished difference Result 100 states and 215 transitions. [2021-07-09 17:21:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:15,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:15,013 INFO L225 Difference]: With dead ends: 100 [2021-07-09 17:21:15,013 INFO L226 Difference]: Without dead ends: 95 [2021-07-09 17:21:15,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-09 17:21:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-07-09 17:21:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4262295081967213) internal successors, (148), 61 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 148 transitions. [2021-07-09 17:21:15,015 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 148 transitions. Word has length 14 [2021-07-09 17:21:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:15,015 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 148 transitions. [2021-07-09 17:21:15,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 148 transitions. [2021-07-09 17:21:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:15,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:15,016 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:15,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:15,233 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 844014171, now seen corresponding path program 21 times [2021-07-09 17:21:15,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:15,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594598372] [2021-07-09 17:21:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:15,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594598372] [2021-07-09 17:21:15,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594598372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734539924] [2021-07-09 17:21:15,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:15,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:15,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:21:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734539924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:15,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:21:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471037996] [2021-07-09 17:21:15,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:15,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:15,310 INFO L87 Difference]: Start difference. First operand 62 states and 148 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:15,354 INFO L93 Difference]: Finished difference Result 145 states and 286 transitions. [2021-07-09 17:21:15,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:15,354 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:15,355 INFO L225 Difference]: With dead ends: 145 [2021-07-09 17:21:15,355 INFO L226 Difference]: Without dead ends: 145 [2021-07-09 17:21:15,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-09 17:21:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 68. [2021-07-09 17:21:15,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-07-09 17:21:15,357 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-07-09 17:21:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:15,357 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-07-09 17:21:15,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-07-09 17:21:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:15,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:15,357 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:15,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:21:15,573 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -306532562, now seen corresponding path program 22 times [2021-07-09 17:21:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:15,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137529703] [2021-07-09 17:21:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:15,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137529703] [2021-07-09 17:21:15,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137529703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836156572] [2021-07-09 17:21:15,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:15,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:15,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:15,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:15,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:15,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:15,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:15,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:15,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:15,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836156572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:15,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:15,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:15,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300286495] [2021-07-09 17:21:15,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:15,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:15,727 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:15,810 INFO L93 Difference]: Finished difference Result 86 states and 210 transitions. [2021-07-09 17:21:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:15,811 INFO L225 Difference]: With dead ends: 86 [2021-07-09 17:21:15,811 INFO L226 Difference]: Without dead ends: 81 [2021-07-09 17:21:15,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:21:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-09 17:21:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-07-09 17:21:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-07-09 17:21:15,813 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-07-09 17:21:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:15,813 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-07-09 17:21:15,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-07-09 17:21:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:15,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:15,813 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:16,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 17:21:16,030 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2032012020, now seen corresponding path program 23 times [2021-07-09 17:21:16,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:16,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153610811] [2021-07-09 17:21:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:16,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153610811] [2021-07-09 17:21:16,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153610811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93472152] [2021-07-09 17:21:16,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:16,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:16,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:16,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:16,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:16,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:16,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:16,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:16,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:16,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:16,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93472152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:16,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364341582] [2021-07-09 17:21:16,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:16,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:16,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:16,245 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:16,418 INFO L93 Difference]: Finished difference Result 95 states and 213 transitions. [2021-07-09 17:21:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:16,419 INFO L225 Difference]: With dead ends: 95 [2021-07-09 17:21:16,419 INFO L226 Difference]: Without dead ends: 90 [2021-07-09 17:21:16,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-09 17:21:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-07-09 17:21:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2021-07-09 17:21:16,421 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 14 [2021-07-09 17:21:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:16,422 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2021-07-09 17:21:16,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2021-07-09 17:21:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:16,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:16,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:16,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 17:21:16,624 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash 626931147, now seen corresponding path program 24 times [2021-07-09 17:21:16,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:16,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920014174] [2021-07-09 17:21:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:16,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920014174] [2021-07-09 17:21:16,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920014174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680433300] [2021-07-09 17:21:16,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:16,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:16,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:21:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:16,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680433300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:16,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:21:16,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779764286] [2021-07-09 17:21:16,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:16,711 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:16,736 INFO L93 Difference]: Finished difference Result 127 states and 274 transitions. [2021-07-09 17:21:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:16,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:16,737 INFO L225 Difference]: With dead ends: 127 [2021-07-09 17:21:16,737 INFO L226 Difference]: Without dead ends: 127 [2021-07-09 17:21:16,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-09 17:21:16,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2021-07-09 17:21:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-07-09 17:21:16,739 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-07-09 17:21:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:16,739 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-07-09 17:21:16,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-07-09 17:21:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:16,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:16,739 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:16,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:16,955 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:16,955 INFO L82 PathProgramCache]: Analyzing trace with hash -542607024, now seen corresponding path program 25 times [2021-07-09 17:21:16,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:16,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206242062] [2021-07-09 17:21:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:16,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206242062] [2021-07-09 17:21:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206242062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715824033] [2021-07-09 17:21:16,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:17,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:17,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:17,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:17,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:17,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715824033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:17,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:17,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489068670] [2021-07-09 17:21:17,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:17,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:17,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:17,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:17,109 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:17,196 INFO L93 Difference]: Finished difference Result 108 states and 241 transitions. [2021-07-09 17:21:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:17,197 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:21:17,197 INFO L226 Difference]: Without dead ends: 103 [2021-07-09 17:21:17,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:21:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-09 17:21:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-07-09 17:21:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.6052631578947367) internal successors, (198), 76 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 198 transitions. [2021-07-09 17:21:17,199 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 198 transitions. Word has length 14 [2021-07-09 17:21:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:17,199 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 198 transitions. [2021-07-09 17:21:17,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 198 transitions. [2021-07-09 17:21:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:17,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:17,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:17,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 17:21:17,416 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1433928655, now seen corresponding path program 26 times [2021-07-09 17:21:17,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:17,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189614751] [2021-07-09 17:21:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:17,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189614751] [2021-07-09 17:21:17,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189614751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659120652] [2021-07-09 17:21:17,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:17,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:21:17,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659120652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:17,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:21:17,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300783719] [2021-07-09 17:21:17,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:17,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:17,486 INFO L87 Difference]: Start difference. First operand 77 states and 198 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:17,532 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-07-09 17:21:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:17,533 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:21:17,533 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:21:17,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:21:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 73. [2021-07-09 17:21:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2021-07-09 17:21:17,535 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 14 [2021-07-09 17:21:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:17,535 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2021-07-09 17:21:17,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2021-07-09 17:21:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:17,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:17,536 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:17,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,752 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:17,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1615692404, now seen corresponding path program 27 times [2021-07-09 17:21:17,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:17,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414295171] [2021-07-09 17:21:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:17,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414295171] [2021-07-09 17:21:17,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414295171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532315777] [2021-07-09 17:21:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:17,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:17,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:17,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:21:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:17,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:17,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 17:21:17,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:17,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:17,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:17,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 17:21:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:17,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532315777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:17,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:17,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:21:17,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355308781] [2021-07-09 17:21:17,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:21:17,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:21:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:17,932 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:18,107 INFO L93 Difference]: Finished difference Result 126 states and 281 transitions. [2021-07-09 17:21:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:18,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:18,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:18,108 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:21:18,108 INFO L226 Difference]: Without dead ends: 121 [2021-07-09 17:21:18,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-09 17:21:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2021-07-09 17:21:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5405405405405403) internal successors, (188), 74 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 188 transitions. [2021-07-09 17:21:18,111 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 188 transitions. Word has length 14 [2021-07-09 17:21:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:18,111 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 188 transitions. [2021-07-09 17:21:18,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 188 transitions. [2021-07-09 17:21:18,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:21:18,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:18,111 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:18,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 17:21:18,328 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash -896073077, now seen corresponding path program 28 times [2021-07-09 17:21:18,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:18,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063148769] [2021-07-09 17:21:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:18,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063148769] [2021-07-09 17:21:18,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063148769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033744743] [2021-07-09 17:21:18,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:18,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:18,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:21:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033744743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:18,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:21:18,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824602497] [2021-07-09 17:21:18,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:18,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:18,400 INFO L87 Difference]: Start difference. First operand 75 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:18,460 INFO L93 Difference]: Finished difference Result 117 states and 263 transitions. [2021-07-09 17:21:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:21:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:18,461 INFO L225 Difference]: With dead ends: 117 [2021-07-09 17:21:18,461 INFO L226 Difference]: Without dead ends: 117 [2021-07-09 17:21:18,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-09 17:21:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2021-07-09 17:21:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 79 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2021-07-09 17:21:18,464 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 14 [2021-07-09 17:21:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:18,465 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2021-07-09 17:21:18,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,465 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2021-07-09 17:21:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:18,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:18,465 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:18,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 17:21:18,678 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash -619671512, now seen corresponding path program 29 times [2021-07-09 17:21:18,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:18,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892501879] [2021-07-09 17:21:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:18,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892501879] [2021-07-09 17:21:18,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892501879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188937447] [2021-07-09 17:21:18,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:18,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:18,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188937447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:18,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:18,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:18,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986611000] [2021-07-09 17:21:18,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:18,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:18,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:18,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:18,757 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:18,807 INFO L93 Difference]: Finished difference Result 152 states and 318 transitions. [2021-07-09 17:21:18,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:18,824 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:21:18,824 INFO L226 Difference]: Without dead ends: 152 [2021-07-09 17:21:18,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-09 17:21:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-07-09 17:21:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.6463414634146343) internal successors, (217), 82 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 217 transitions. [2021-07-09 17:21:18,827 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 217 transitions. Word has length 15 [2021-07-09 17:21:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:18,827 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 217 transitions. [2021-07-09 17:21:18,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 217 transitions. [2021-07-09 17:21:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:18,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:18,827 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:19,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 17:21:19,044 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:19,044 INFO L82 PathProgramCache]: Analyzing trace with hash -707581453, now seen corresponding path program 30 times [2021-07-09 17:21:19,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:19,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885333622] [2021-07-09 17:21:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:19,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885333622] [2021-07-09 17:21:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885333622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739129547] [2021-07-09 17:21:19,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:19,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:19,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:19,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739129547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:19,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:19,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819194972] [2021-07-09 17:21:19,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:19,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:19,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:19,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:19,116 INFO L87 Difference]: Start difference. First operand 83 states and 217 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:19,197 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-07-09 17:21:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:21:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:19,198 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:21:19,198 INFO L226 Difference]: Without dead ends: 151 [2021-07-09 17:21:19,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-09 17:21:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2021-07-09 17:21:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.640449438202247) internal successors, (235), 89 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 235 transitions. [2021-07-09 17:21:19,200 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 235 transitions. Word has length 15 [2021-07-09 17:21:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:19,200 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 235 transitions. [2021-07-09 17:21:19,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 235 transitions. [2021-07-09 17:21:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:19,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:19,201 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:19,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:21:19,417 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1774821498, now seen corresponding path program 31 times [2021-07-09 17:21:19,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:19,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619744575] [2021-07-09 17:21:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619744575] [2021-07-09 17:21:19,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619744575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374736615] [2021-07-09 17:21:19,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374736615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:19,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:21:19,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137098170] [2021-07-09 17:21:19,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:19,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:19,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:19,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:19,484 INFO L87 Difference]: Start difference. First operand 90 states and 235 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:19,536 INFO L93 Difference]: Finished difference Result 119 states and 275 transitions. [2021-07-09 17:21:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:19,537 INFO L225 Difference]: With dead ends: 119 [2021-07-09 17:21:19,537 INFO L226 Difference]: Without dead ends: 115 [2021-07-09 17:21:19,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-09 17:21:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2021-07-09 17:21:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5934065934065935) internal successors, (236), 91 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 236 transitions. [2021-07-09 17:21:19,539 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 236 transitions. Word has length 15 [2021-07-09 17:21:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:19,539 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 236 transitions. [2021-07-09 17:21:19,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 236 transitions. [2021-07-09 17:21:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:19,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:19,540 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:19,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:21:19,757 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:19,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:19,757 INFO L82 PathProgramCache]: Analyzing trace with hash 884121669, now seen corresponding path program 32 times [2021-07-09 17:21:19,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:19,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288247398] [2021-07-09 17:21:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:19,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288247398] [2021-07-09 17:21:19,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288247398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693109168] [2021-07-09 17:21:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:19,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:19,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:19,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:19,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:19,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693109168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:19,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:19,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:21:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739888419] [2021-07-09 17:21:19,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:19,827 INFO L87 Difference]: Start difference. First operand 92 states and 236 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:19,880 INFO L93 Difference]: Finished difference Result 156 states and 331 transitions. [2021-07-09 17:21:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:19,883 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:21:19,883 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:21:19,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:21:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 89. [2021-07-09 17:21:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.5454545454545454) internal successors, (224), 88 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 224 transitions. [2021-07-09 17:21:19,885 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 224 transitions. Word has length 15 [2021-07-09 17:21:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 224 transitions. [2021-07-09 17:21:19,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 224 transitions. [2021-07-09 17:21:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:19,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:19,886 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 17:21:20,102 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 333838132, now seen corresponding path program 33 times [2021-07-09 17:21:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122615737] [2021-07-09 17:21:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122615737] [2021-07-09 17:21:20,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122615737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67694456] [2021-07-09 17:21:20,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:20,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67694456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287615078] [2021-07-09 17:21:20,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:20,197 INFO L87 Difference]: Start difference. First operand 89 states and 224 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:20,245 INFO L93 Difference]: Finished difference Result 126 states and 290 transitions. [2021-07-09 17:21:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:20,246 INFO L225 Difference]: With dead ends: 126 [2021-07-09 17:21:20,246 INFO L226 Difference]: Without dead ends: 122 [2021-07-09 17:21:20,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-09 17:21:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 89. [2021-07-09 17:21:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-07-09 17:21:20,248 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-07-09 17:21:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,248 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-07-09 17:21:20,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-07-09 17:21:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:20,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,248 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 17:21:20,465 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash -557483499, now seen corresponding path program 34 times [2021-07-09 17:21:20,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760512304] [2021-07-09 17:21:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760512304] [2021-07-09 17:21:20,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760512304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845856132] [2021-07-09 17:21:20,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:20,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845856132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:20,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496199277] [2021-07-09 17:21:20,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:20,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:20,569 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:20,617 INFO L93 Difference]: Finished difference Result 160 states and 342 transitions. [2021-07-09 17:21:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:20,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:20,618 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:21:20,618 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:21:20,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:21:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 89. [2021-07-09 17:21:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.534090909090909) internal successors, (223), 88 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2021-07-09 17:21:20,621 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 15 [2021-07-09 17:21:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,621 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2021-07-09 17:21:20,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2021-07-09 17:21:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:20,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,621 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:20,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:21:20,839 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1708030232, now seen corresponding path program 35 times [2021-07-09 17:21:20,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:20,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701923271] [2021-07-09 17:21:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:20,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:20,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701923271] [2021-07-09 17:21:20,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701923271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172733892] [2021-07-09 17:21:20,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:20,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:20,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172733892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:20,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:20,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:21:20,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462896995] [2021-07-09 17:21:20,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:20,913 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:20,942 INFO L93 Difference]: Finished difference Result 180 states and 397 transitions. [2021-07-09 17:21:20,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:21:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:20,943 INFO L225 Difference]: With dead ends: 180 [2021-07-09 17:21:20,943 INFO L226 Difference]: Without dead ends: 180 [2021-07-09 17:21:20,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-09 17:21:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 97. [2021-07-09 17:21:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.6354166666666665) internal successors, (253), 96 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 253 transitions. [2021-07-09 17:21:20,945 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 253 transitions. Word has length 15 [2021-07-09 17:21:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:20,945 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 253 transitions. [2021-07-09 17:21:20,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 253 transitions. [2021-07-09 17:21:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:20,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:20,946 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:21,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:21:21,162 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:21,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1809787465, now seen corresponding path program 36 times [2021-07-09 17:21:21,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:21,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581209628] [2021-07-09 17:21:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581209628] [2021-07-09 17:21:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581209628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592168647] [2021-07-09 17:21:21,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:21:21,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:21,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:21,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592168647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:21,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:21:21,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249094385] [2021-07-09 17:21:21,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:21:21,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:21:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:21:21,225 INFO L87 Difference]: Start difference. First operand 97 states and 253 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:21,272 INFO L93 Difference]: Finished difference Result 152 states and 341 transitions. [2021-07-09 17:21:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:21,273 INFO L225 Difference]: With dead ends: 152 [2021-07-09 17:21:21,273 INFO L226 Difference]: Without dead ends: 150 [2021-07-09 17:21:21,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-09 17:21:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-07-09 17:21:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.676470588235294) internal successors, (273), 102 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 273 transitions. [2021-07-09 17:21:21,277 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 273 transitions. Word has length 15 [2021-07-09 17:21:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:21,277 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 273 transitions. [2021-07-09 17:21:21,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 273 transitions. [2021-07-09 17:21:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:21,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:21,277 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:21,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,492 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:21,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:21,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104694, now seen corresponding path program 37 times [2021-07-09 17:21:21,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:21,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764482383] [2021-07-09 17:21:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764482383] [2021-07-09 17:21:21,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764482383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227415392] [2021-07-09 17:21:21,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227415392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:21,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:21,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638308513] [2021-07-09 17:21:21,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:21,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:21,561 INFO L87 Difference]: Start difference. First operand 103 states and 273 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:21,615 INFO L93 Difference]: Finished difference Result 161 states and 375 transitions. [2021-07-09 17:21:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:21,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:21,616 INFO L225 Difference]: With dead ends: 161 [2021-07-09 17:21:21,616 INFO L226 Difference]: Without dead ends: 155 [2021-07-09 17:21:21,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-09 17:21:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 105. [2021-07-09 17:21:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6538461538461537) internal successors, (276), 104 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 276 transitions. [2021-07-09 17:21:21,619 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 276 transitions. Word has length 15 [2021-07-09 17:21:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:21,619 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 276 transitions. [2021-07-09 17:21:21,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 276 transitions. [2021-07-09 17:21:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:21,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:21,619 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:21,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,836 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1459540971, now seen corresponding path program 38 times [2021-07-09 17:21:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893329797] [2021-07-09 17:21:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:21,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893329797] [2021-07-09 17:21:21,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893329797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008197675] [2021-07-09 17:21:21,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:21,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008197675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:21,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:21,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900516320] [2021-07-09 17:21:21,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:21,960 INFO L87 Difference]: Start difference. First operand 105 states and 276 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:22,006 INFO L93 Difference]: Finished difference Result 156 states and 350 transitions. [2021-07-09 17:21:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:22,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:22,007 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:21:22,007 INFO L226 Difference]: Without dead ends: 156 [2021-07-09 17:21:22,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-09 17:21:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 99. [2021-07-09 17:21:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.6020408163265305) internal successors, (255), 98 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2021-07-09 17:21:22,011 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 15 [2021-07-09 17:21:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:22,011 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2021-07-09 17:21:22,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2021-07-09 17:21:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:22,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:22,011 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:22,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:22,225 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:22,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1277777222, now seen corresponding path program 39 times [2021-07-09 17:21:22,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:22,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252508727] [2021-07-09 17:21:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:22,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252508727] [2021-07-09 17:21:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252508727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286836653] [2021-07-09 17:21:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:22,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:22,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286836653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:22,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:22,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:22,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554949552] [2021-07-09 17:21:22,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:22,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:22,382 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:22,454 INFO L93 Difference]: Finished difference Result 165 states and 373 transitions. [2021-07-09 17:21:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:21:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:22,455 INFO L225 Difference]: With dead ends: 165 [2021-07-09 17:21:22,455 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 17:21:22,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 17:21:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 103. [2021-07-09 17:21:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.5686274509803924) internal successors, (262), 102 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 262 transitions. [2021-07-09 17:21:22,458 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 262 transitions. Word has length 15 [2021-07-09 17:21:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:22,458 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 262 transitions. [2021-07-09 17:21:22,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 262 transitions. [2021-07-09 17:21:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:22,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:22,458 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:22,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 17:21:22,675 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:22,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1997396549, now seen corresponding path program 40 times [2021-07-09 17:21:22,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:22,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150121769] [2021-07-09 17:21:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:22,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150121769] [2021-07-09 17:21:22,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150121769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592509592] [2021-07-09 17:21:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:22,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:22,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:22,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592509592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:22,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:22,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:22,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286824132] [2021-07-09 17:21:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:22,754 INFO L87 Difference]: Start difference. First operand 103 states and 262 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:22,824 INFO L93 Difference]: Finished difference Result 164 states and 357 transitions. [2021-07-09 17:21:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:22,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:22,825 INFO L225 Difference]: With dead ends: 164 [2021-07-09 17:21:22,826 INFO L226 Difference]: Without dead ends: 164 [2021-07-09 17:21:22,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-09 17:21:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-07-09 17:21:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.56) internal successors, (256), 100 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 256 transitions. [2021-07-09 17:21:22,829 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 256 transitions. Word has length 15 [2021-07-09 17:21:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:22,829 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 256 transitions. [2021-07-09 17:21:22,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 256 transitions. [2021-07-09 17:21:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:22,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:22,829 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:23,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 17:21:23,044 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash 690186194, now seen corresponding path program 41 times [2021-07-09 17:21:23,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:23,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560636346] [2021-07-09 17:21:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560636346] [2021-07-09 17:21:23,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560636346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651888983] [2021-07-09 17:21:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:23,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:23,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651888983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:23,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:23,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49033451] [2021-07-09 17:21:23,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:23,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:23,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:23,114 INFO L87 Difference]: Start difference. First operand 101 states and 256 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:23,149 INFO L93 Difference]: Finished difference Result 205 states and 458 transitions. [2021-07-09 17:21:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:23,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:23,150 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:21:23,150 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 17:21:23,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 17:21:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 119. [2021-07-09 17:21:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.73728813559322) internal successors, (323), 118 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 323 transitions. [2021-07-09 17:21:23,153 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 323 transitions. Word has length 15 [2021-07-09 17:21:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:23,153 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 323 transitions. [2021-07-09 17:21:23,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 323 transitions. [2021-07-09 17:21:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:23,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:23,154 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:23,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 17:21:23,370 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -86963405, now seen corresponding path program 42 times [2021-07-09 17:21:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997281382] [2021-07-09 17:21:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997281382] [2021-07-09 17:21:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997281382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034172651] [2021-07-09 17:21:23,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:23,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034172651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:23,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809351278] [2021-07-09 17:21:23,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:23,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:23,483 INFO L87 Difference]: Start difference. First operand 119 states and 323 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:23,538 INFO L93 Difference]: Finished difference Result 198 states and 459 transitions. [2021-07-09 17:21:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:23,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:23,539 INFO L225 Difference]: With dead ends: 198 [2021-07-09 17:21:23,539 INFO L226 Difference]: Without dead ends: 196 [2021-07-09 17:21:23,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-07-09 17:21:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-07-09 17:21:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.811023622047244) internal successors, (357), 127 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 357 transitions. [2021-07-09 17:21:23,542 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 357 transitions. Word has length 15 [2021-07-09 17:21:23,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:23,542 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 357 transitions. [2021-07-09 17:21:23,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 357 transitions. [2021-07-09 17:21:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:23,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:23,543 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:23,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:21:23,759 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:23,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1035293264, now seen corresponding path program 43 times [2021-07-09 17:21:23,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:23,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116962968] [2021-07-09 17:21:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:23,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116962968] [2021-07-09 17:21:23,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116962968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156697213] [2021-07-09 17:21:23,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:23,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156697213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:23,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:23,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:23,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103612636] [2021-07-09 17:21:23,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:23,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:23,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:23,825 INFO L87 Difference]: Start difference. First operand 128 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:23,883 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-07-09 17:21:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:23,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:23,884 INFO L225 Difference]: With dead ends: 206 [2021-07-09 17:21:23,884 INFO L226 Difference]: Without dead ends: 204 [2021-07-09 17:21:23,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-07-09 17:21:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2021-07-09 17:21:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.8031496062992125) internal successors, (356), 127 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 356 transitions. [2021-07-09 17:21:23,887 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 356 transitions. Word has length 15 [2021-07-09 17:21:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:23,887 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 356 transitions. [2021-07-09 17:21:23,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 356 transitions. [2021-07-09 17:21:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:23,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:23,887 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:24,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:24,104 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1623649903, now seen corresponding path program 44 times [2021-07-09 17:21:24,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:24,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110263057] [2021-07-09 17:21:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:24,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110263057] [2021-07-09 17:21:24,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110263057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333230177] [2021-07-09 17:21:24,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:24,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:24,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333230177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:24,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:24,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425519408] [2021-07-09 17:21:24,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:24,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:24,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:24,237 INFO L87 Difference]: Start difference. First operand 128 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:24,270 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2021-07-09 17:21:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:21:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:24,271 INFO L225 Difference]: With dead ends: 187 [2021-07-09 17:21:24,271 INFO L226 Difference]: Without dead ends: 187 [2021-07-09 17:21:24,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-07-09 17:21:24,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 129. [2021-07-09 17:21:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.7890625) internal successors, (357), 128 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 357 transitions. [2021-07-09 17:21:24,274 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 357 transitions. Word has length 15 [2021-07-09 17:21:24,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:24,274 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 357 transitions. [2021-07-09 17:21:24,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,274 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 357 transitions. [2021-07-09 17:21:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:24,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:24,275 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:24,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 17:21:24,491 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:24,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:24,491 INFO L82 PathProgramCache]: Analyzing trace with hash 454111732, now seen corresponding path program 45 times [2021-07-09 17:21:24,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:24,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160299563] [2021-07-09 17:21:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:24,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160299563] [2021-07-09 17:21:24,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160299563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310398947] [2021-07-09 17:21:24,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:24,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:24,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310398947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:24,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:24,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821294536] [2021-07-09 17:21:24,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:24,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:24,555 INFO L87 Difference]: Start difference. First operand 129 states and 357 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:24,604 INFO L93 Difference]: Finished difference Result 215 states and 521 transitions. [2021-07-09 17:21:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:24,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:24,605 INFO L225 Difference]: With dead ends: 215 [2021-07-09 17:21:24,606 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:21:24,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:21:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:21:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 129. [2021-07-09 17:21:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.78125) internal successors, (356), 128 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 356 transitions. [2021-07-09 17:21:24,608 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 356 transitions. Word has length 15 [2021-07-09 17:21:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:24,609 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 356 transitions. [2021-07-09 17:21:24,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 356 transitions. [2021-07-09 17:21:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:24,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:24,609 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:24,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 17:21:24,818 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:24,818 INFO L82 PathProgramCache]: Analyzing trace with hash -437209899, now seen corresponding path program 46 times [2021-07-09 17:21:24,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:24,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017947408] [2021-07-09 17:21:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:24,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:24,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017947408] [2021-07-09 17:21:24,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017947408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268849614] [2021-07-09 17:21:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:24,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:24,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:24,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268849614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:24,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:24,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:21:24,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438534736] [2021-07-09 17:21:24,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:21:24,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:21:24,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:21:24,894 INFO L87 Difference]: Start difference. First operand 129 states and 356 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:24,925 INFO L93 Difference]: Finished difference Result 166 states and 422 transitions. [2021-07-09 17:21:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:21:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:24,926 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:21:24,926 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:21:24,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:21:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2021-07-09 17:21:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-07-09 17:21:24,928 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 15 [2021-07-09 17:21:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:24,928 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-07-09 17:21:24,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-07-09 17:21:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:24,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:24,929 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:25,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,146 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash -618973648, now seen corresponding path program 47 times [2021-07-09 17:21:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:25,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396979851] [2021-07-09 17:21:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396979851] [2021-07-09 17:21:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396979851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064952175] [2021-07-09 17:21:25,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:25,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064952175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870875100] [2021-07-09 17:21:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:25,218 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:25,289 INFO L93 Difference]: Finished difference Result 217 states and 530 transitions. [2021-07-09 17:21:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:21:25,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:25,290 INFO L225 Difference]: With dead ends: 217 [2021-07-09 17:21:25,290 INFO L226 Difference]: Without dead ends: 211 [2021-07-09 17:21:25,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:21:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-07-09 17:21:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-07-09 17:21:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-07-09 17:21:25,293 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-07-09 17:21:25,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:25,293 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-07-09 17:21:25,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-07-09 17:21:25,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:25,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:25,294 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:25,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,510 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:25,510 INFO L82 PathProgramCache]: Analyzing trace with hash 100645679, now seen corresponding path program 48 times [2021-07-09 17:21:25,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:25,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012396501] [2021-07-09 17:21:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012396501] [2021-07-09 17:21:25,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012396501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093786560] [2021-07-09 17:21:25,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:25,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:25,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093786560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:25,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:25,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497642390] [2021-07-09 17:21:25,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:25,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:25,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:25,607 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:25,677 INFO L93 Difference]: Finished difference Result 184 states and 467 transitions. [2021-07-09 17:21:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:25,678 INFO L225 Difference]: With dead ends: 184 [2021-07-09 17:21:25,678 INFO L226 Difference]: Without dead ends: 184 [2021-07-09 17:21:25,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:21:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-07-09 17:21:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2021-07-09 17:21:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8297872340425534) internal successors, (399), 141 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 399 transitions. [2021-07-09 17:21:25,680 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 399 transitions. Word has length 15 [2021-07-09 17:21:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:25,680 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 399 transitions. [2021-07-09 17:21:25,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 399 transitions. [2021-07-09 17:21:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:25,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:25,681 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:25,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,898 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash 475117940, now seen corresponding path program 49 times [2021-07-09 17:21:25,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:25,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172776211] [2021-07-09 17:21:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:25,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:25,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172776211] [2021-07-09 17:21:25,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172776211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:25,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887164682] [2021-07-09 17:21:25,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887164682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:26,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997179157] [2021-07-09 17:21:26,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:26,013 INFO L87 Difference]: Start difference. First operand 142 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:26,049 INFO L93 Difference]: Finished difference Result 186 states and 481 transitions. [2021-07-09 17:21:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:26,050 INFO L225 Difference]: With dead ends: 186 [2021-07-09 17:21:26,050 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:21:26,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:21:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:21:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-07-09 17:21:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.841726618705036) internal successors, (395), 139 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 395 transitions. [2021-07-09 17:21:26,053 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 395 transitions. Word has length 15 [2021-07-09 17:21:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:26,053 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 395 transitions. [2021-07-09 17:21:26,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 395 transitions. [2021-07-09 17:21:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:21:26,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:26,053 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:26,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-07-09 17:21:26,270 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash -405700587, now seen corresponding path program 50 times [2021-07-09 17:21:26,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:26,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107868763] [2021-07-09 17:21:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:26,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107868763] [2021-07-09 17:21:26,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107868763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179732306] [2021-07-09 17:21:26,296 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:26,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:26,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:26,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:21:26,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179732306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:26,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:21:26,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941896146] [2021-07-09 17:21:26,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:26,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:26,367 INFO L87 Difference]: Start difference. First operand 140 states and 395 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:26,464 INFO L93 Difference]: Finished difference Result 189 states and 494 transitions. [2021-07-09 17:21:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:21:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:26,465 INFO L225 Difference]: With dead ends: 189 [2021-07-09 17:21:26,466 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:21:26,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:21:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:21:26,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2021-07-09 17:21:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.8299319727891157) internal successors, (416), 147 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 416 transitions. [2021-07-09 17:21:26,478 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 416 transitions. Word has length 15 [2021-07-09 17:21:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:26,478 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 416 transitions. [2021-07-09 17:21:26,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 416 transitions. [2021-07-09 17:21:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:26,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:26,479 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:26,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 17:21:26,680 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:26,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1204336263, now seen corresponding path program 51 times [2021-07-09 17:21:26,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:26,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446875049] [2021-07-09 17:21:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:26,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:26,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446875049] [2021-07-09 17:21:26,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446875049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239289947] [2021-07-09 17:21:26,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:26,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:26,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:27,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:27,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:27,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:27,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:27,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:27,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:27,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239289947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:27,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:27,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:27,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484923491] [2021-07-09 17:21:27,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:27,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:27,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:27,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:27,065 INFO L87 Difference]: Start difference. First operand 148 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:27,336 INFO L93 Difference]: Finished difference Result 205 states and 527 transitions. [2021-07-09 17:21:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:21:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:27,337 INFO L225 Difference]: With dead ends: 205 [2021-07-09 17:21:27,338 INFO L226 Difference]: Without dead ends: 178 [2021-07-09 17:21:27,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-09 17:21:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2021-07-09 17:21:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8343949044585988) internal successors, (445), 157 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 445 transitions. [2021-07-09 17:21:27,341 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 445 transitions. Word has length 16 [2021-07-09 17:21:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:27,341 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 445 transitions. [2021-07-09 17:21:27,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 445 transitions. [2021-07-09 17:21:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:27,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:27,342 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:27,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 17:21:27,563 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:27,563 INFO L82 PathProgramCache]: Analyzing trace with hash 387366859, now seen corresponding path program 52 times [2021-07-09 17:21:27,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:27,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258606776] [2021-07-09 17:21:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:27,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:27,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258606776] [2021-07-09 17:21:27,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258606776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:27,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827415250] [2021-07-09 17:21:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:27,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:27,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:27,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:27,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:27,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:27,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:27,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:27,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827415250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:27,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:27,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:27,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039285157] [2021-07-09 17:21:27,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:27,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:27,821 INFO L87 Difference]: Start difference. First operand 158 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:27,997 INFO L93 Difference]: Finished difference Result 218 states and 567 transitions. [2021-07-09 17:21:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:27,998 INFO L225 Difference]: With dead ends: 218 [2021-07-09 17:21:27,998 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 17:21:27,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 17:21:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 169. [2021-07-09 17:21:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-07-09 17:21:28,001 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-07-09 17:21:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:28,002 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-07-09 17:21:28,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-07-09 17:21:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:28,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:28,002 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:28,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:21:28,218 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1246241389, now seen corresponding path program 53 times [2021-07-09 17:21:28,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:28,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057318773] [2021-07-09 17:21:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:28,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:28,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057318773] [2021-07-09 17:21:28,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057318773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:28,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17823832] [2021-07-09 17:21:28,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:28,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:28,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:28,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:28,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:28,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:28,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:28,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:28,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:28,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:28,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:28,572 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:28,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:28,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:28,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17823832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:28,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:28,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:28,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873342838] [2021-07-09 17:21:28,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:28,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:28,595 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:28,773 INFO L93 Difference]: Finished difference Result 234 states and 603 transitions. [2021-07-09 17:21:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:28,774 INFO L225 Difference]: With dead ends: 234 [2021-07-09 17:21:28,774 INFO L226 Difference]: Without dead ends: 224 [2021-07-09 17:21:28,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-09 17:21:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 169. [2021-07-09 17:21:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.875) internal successors, (483), 168 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 483 transitions. [2021-07-09 17:21:28,778 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 483 transitions. Word has length 16 [2021-07-09 17:21:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:28,778 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 483 transitions. [2021-07-09 17:21:28,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 483 transitions. [2021-07-09 17:21:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:28,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:28,780 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:29,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:21:29,001 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1054238309, now seen corresponding path program 54 times [2021-07-09 17:21:29,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:29,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029755345] [2021-07-09 17:21:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:29,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:29,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029755345] [2021-07-09 17:21:29,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029755345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:29,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597361336] [2021-07-09 17:21:29,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:29,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:29,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:29,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:29,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:29,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:29,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:29,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:29,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597361336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:29,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:29,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:29,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145390081] [2021-07-09 17:21:29,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:29,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:29,299 INFO L87 Difference]: Start difference. First operand 169 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:29,540 INFO L93 Difference]: Finished difference Result 232 states and 635 transitions. [2021-07-09 17:21:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:29,541 INFO L225 Difference]: With dead ends: 232 [2021-07-09 17:21:29,541 INFO L226 Difference]: Without dead ends: 216 [2021-07-09 17:21:29,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-09 17:21:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 188. [2021-07-09 17:21:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9411764705882355) internal successors, (550), 187 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 550 transitions. [2021-07-09 17:21:29,551 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 550 transitions. Word has length 16 [2021-07-09 17:21:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:29,551 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 550 transitions. [2021-07-09 17:21:29,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 550 transitions. [2021-07-09 17:21:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:29,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:29,551 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:29,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-07-09 17:21:29,768 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash -195363779, now seen corresponding path program 55 times [2021-07-09 17:21:29,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:29,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459154768] [2021-07-09 17:21:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:29,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:29,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459154768] [2021-07-09 17:21:29,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459154768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:29,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276301910] [2021-07-09 17:21:29,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:29,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:29,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:30,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:30,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:30,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:30,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:30,080 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:30,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:30,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:30,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276301910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:30,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:30,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:30,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031152835] [2021-07-09 17:21:30,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:30,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:30,104 INFO L87 Difference]: Start difference. First operand 188 states and 550 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:30,360 INFO L93 Difference]: Finished difference Result 263 states and 691 transitions. [2021-07-09 17:21:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:30,361 INFO L225 Difference]: With dead ends: 263 [2021-07-09 17:21:30,361 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:21:30,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:30,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:21:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-07-09 17:21:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.918918918918919) internal successors, (540), 185 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 540 transitions. [2021-07-09 17:21:30,365 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 540 transitions. Word has length 16 [2021-07-09 17:21:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:30,365 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 540 transitions. [2021-07-09 17:21:30,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 540 transitions. [2021-07-09 17:21:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:30,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:30,365 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:30,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:30,583 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1515249529, now seen corresponding path program 56 times [2021-07-09 17:21:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:30,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023234189] [2021-07-09 17:21:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:30,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:30,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023234189] [2021-07-09 17:21:30,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023234189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:30,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227244588] [2021-07-09 17:21:30,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:30,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:30,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:30,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:30,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:30,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:30,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:30,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:31,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:31,040 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:31,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:31,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227244588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:31,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:31,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100055155] [2021-07-09 17:21:31,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:31,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:31,080 INFO L87 Difference]: Start difference. First operand 186 states and 540 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:31,347 INFO L93 Difference]: Finished difference Result 229 states and 625 transitions. [2021-07-09 17:21:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:31,349 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:21:31,349 INFO L226 Difference]: Without dead ends: 219 [2021-07-09 17:21:31,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:21:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-09 17:21:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-07-09 17:21:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9193548387096775) internal successors, (543), 186 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 543 transitions. [2021-07-09 17:21:31,352 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 543 transitions. Word has length 16 [2021-07-09 17:21:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:31,352 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 543 transitions. [2021-07-09 17:21:31,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 543 transitions. [2021-07-09 17:21:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:31,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:31,353 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:31,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 17:21:31,569 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1313032655, now seen corresponding path program 57 times [2021-07-09 17:21:31,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:31,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460810659] [2021-07-09 17:21:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:31,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460810659] [2021-07-09 17:21:31,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460810659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125508675] [2021-07-09 17:21:31,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:31,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:31,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:31,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:31,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:31,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:31,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:31,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:31,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:31,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:31,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:31,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125508675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:31,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:31,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:21:31,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352340388] [2021-07-09 17:21:31,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:31,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:31,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:31,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:31,811 INFO L87 Difference]: Start difference. First operand 187 states and 543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:31,948 INFO L93 Difference]: Finished difference Result 208 states and 572 transitions. [2021-07-09 17:21:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:21:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 16 [2021-07-09 17:21:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:31,949 INFO L225 Difference]: With dead ends: 208 [2021-07-09 17:21:31,949 INFO L226 Difference]: Without dead ends: 190 [2021-07-09 17:21:31,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-09 17:21:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2021-07-09 17:21:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.913978494623656) internal successors, (542), 186 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 542 transitions. [2021-07-09 17:21:31,952 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 542 transitions. Word has length 16 [2021-07-09 17:21:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:31,952 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 542 transitions. [2021-07-09 17:21:31,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 542 transitions. [2021-07-09 17:21:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:31,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:31,953 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:32,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:32,169 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash -762693297, now seen corresponding path program 58 times [2021-07-09 17:21:32,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:32,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836379231] [2021-07-09 17:21:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:32,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:32,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836379231] [2021-07-09 17:21:32,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836379231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869615746] [2021-07-09 17:21:32,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:32,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:32,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:32,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:32,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:32,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:32,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:32,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:32,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:32,499 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:32,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:32,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:32,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869615746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:32,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:32,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195587359] [2021-07-09 17:21:32,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:32,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:32,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:32,521 INFO L87 Difference]: Start difference. First operand 187 states and 542 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:32,794 INFO L93 Difference]: Finished difference Result 260 states and 675 transitions. [2021-07-09 17:21:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:32,796 INFO L225 Difference]: With dead ends: 260 [2021-07-09 17:21:32,796 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:21:32,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:21:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:21:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2021-07-09 17:21:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.8842105263157896) internal successors, (548), 190 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 548 transitions. [2021-07-09 17:21:32,799 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 548 transitions. Word has length 16 [2021-07-09 17:21:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:32,799 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 548 transitions. [2021-07-09 17:21:32,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 548 transitions. [2021-07-09 17:21:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:32,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:32,800 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:33,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:33,016 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1500641739, now seen corresponding path program 59 times [2021-07-09 17:21:33,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:33,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007616690] [2021-07-09 17:21:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:33,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:33,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007616690] [2021-07-09 17:21:33,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007616690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:33,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992538783] [2021-07-09 17:21:33,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:33,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:21:33,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:33,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:33,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:33,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:33,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:33,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992538783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:33,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:33,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:33,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315413851] [2021-07-09 17:21:33,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:33,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:33,296 INFO L87 Difference]: Start difference. First operand 191 states and 548 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:33,522 INFO L93 Difference]: Finished difference Result 264 states and 729 transitions. [2021-07-09 17:21:33,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:33,523 INFO L225 Difference]: With dead ends: 264 [2021-07-09 17:21:33,523 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:21:33,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:21:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 216. [2021-07-09 17:21:33,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.9488372093023254) internal successors, (634), 215 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 634 transitions. [2021-07-09 17:21:33,527 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 634 transitions. Word has length 16 [2021-07-09 17:21:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:33,527 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 634 transitions. [2021-07-09 17:21:33,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 634 transitions. [2021-07-09 17:21:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:33,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:33,527 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:33,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:33,744 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:33,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1935451027, now seen corresponding path program 60 times [2021-07-09 17:21:33,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:33,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227276899] [2021-07-09 17:21:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:33,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:33,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227276899] [2021-07-09 17:21:33,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227276899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:33,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659467979] [2021-07-09 17:21:33,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:33,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:33,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:33,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:33,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:34,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:34,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:34,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:34,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:34,066 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:34,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:34,067 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:34,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659467979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:34,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:34,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639878004] [2021-07-09 17:21:34,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:34,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:34,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:34,089 INFO L87 Difference]: Start difference. First operand 216 states and 634 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:34,438 INFO L93 Difference]: Finished difference Result 318 states and 837 transitions. [2021-07-09 17:21:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:21:34,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:34,439 INFO L225 Difference]: With dead ends: 318 [2021-07-09 17:21:34,439 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:21:34,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:21:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:21:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2021-07-09 17:21:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.944700460829493) internal successors, (639), 217 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 639 transitions. [2021-07-09 17:21:34,444 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 639 transitions. Word has length 16 [2021-07-09 17:21:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:34,444 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 639 transitions. [2021-07-09 17:21:34,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 639 transitions. [2021-07-09 17:21:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:34,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:34,445 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:34,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-07-09 17:21:34,654 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash -224837719, now seen corresponding path program 61 times [2021-07-09 17:21:34,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:34,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435886254] [2021-07-09 17:21:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:34,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:34,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435886254] [2021-07-09 17:21:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435886254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:34,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504188322] [2021-07-09 17:21:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:34,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:34,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:34,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:34,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:34,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:34,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:34,996 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:34,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:34,997 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:35,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504188322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:35,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:35,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:35,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467860165] [2021-07-09 17:21:35,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:35,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:35,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:35,020 INFO L87 Difference]: Start difference. First operand 218 states and 639 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:35,448 INFO L93 Difference]: Finished difference Result 355 states and 911 transitions. [2021-07-09 17:21:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:21:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:35,450 INFO L225 Difference]: With dead ends: 355 [2021-07-09 17:21:35,450 INFO L226 Difference]: Without dead ends: 322 [2021-07-09 17:21:35,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:21:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-09 17:21:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 210. [2021-07-09 17:21:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.909090909090909) internal successors, (608), 209 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 608 transitions. [2021-07-09 17:21:35,455 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 608 transitions. Word has length 16 [2021-07-09 17:21:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:35,455 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 608 transitions. [2021-07-09 17:21:35,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 608 transitions. [2021-07-09 17:21:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:35,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:35,456 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:35,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-07-09 17:21:35,665 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1264567277, now seen corresponding path program 62 times [2021-07-09 17:21:35,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:35,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208615399] [2021-07-09 17:21:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208615399] [2021-07-09 17:21:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208615399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950792285] [2021-07-09 17:21:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:35,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:35,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:36,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:36,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:36,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:36,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:36,096 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:36,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:36,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:36,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950792285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:36,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:36,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:36,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965374960] [2021-07-09 17:21:36,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:36,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:36,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:36,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:36,120 INFO L87 Difference]: Start difference. First operand 210 states and 608 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:36,372 INFO L93 Difference]: Finished difference Result 275 states and 745 transitions. [2021-07-09 17:21:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:21:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:36,373 INFO L225 Difference]: With dead ends: 275 [2021-07-09 17:21:36,373 INFO L226 Difference]: Without dead ends: 265 [2021-07-09 17:21:36,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:21:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-07-09 17:21:36,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2021-07-09 17:21:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9095238095238094) internal successors, (611), 210 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 611 transitions. [2021-07-09 17:21:36,377 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 611 transitions. Word has length 16 [2021-07-09 17:21:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:36,377 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 611 transitions. [2021-07-09 17:21:36,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:36,377 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 611 transitions. [2021-07-09 17:21:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:36,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:36,378 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:36,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-09 17:21:36,594 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash -583718215, now seen corresponding path program 63 times [2021-07-09 17:21:36,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:36,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754499122] [2021-07-09 17:21:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:36,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:36,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754499122] [2021-07-09 17:21:36,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754499122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:36,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164413079] [2021-07-09 17:21:36,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:36,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:36,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:36,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:36,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:36,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:36,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:36,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:36,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:36,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:36,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164413079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:36,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:36,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:36,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722383245] [2021-07-09 17:21:36,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:36,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:36,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:36,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:36,850 INFO L87 Difference]: Start difference. First operand 211 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:37,016 INFO L93 Difference]: Finished difference Result 238 states and 653 transitions. [2021-07-09 17:21:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:37,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:37,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:37,018 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:21:37,018 INFO L226 Difference]: Without dead ends: 220 [2021-07-09 17:21:37,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:21:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-09 17:21:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2021-07-09 17:21:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2021-07-09 17:21:37,021 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 16 [2021-07-09 17:21:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2021-07-09 17:21:37,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2021-07-09 17:21:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:37,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:37,022 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:37,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:37,237 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash -632183593, now seen corresponding path program 64 times [2021-07-09 17:21:37,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:37,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673927349] [2021-07-09 17:21:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:37,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:37,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673927349] [2021-07-09 17:21:37,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673927349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:37,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228265359] [2021-07-09 17:21:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:37,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:37,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:37,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:37,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:37,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:37,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:37,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:37,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:37,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:37,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:37,545 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:37,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:37,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:37,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228265359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:37,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:37,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:37,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190007039] [2021-07-09 17:21:37,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:37,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:37,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:37,567 INFO L87 Difference]: Start difference. First operand 211 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:37,902 INFO L93 Difference]: Finished difference Result 298 states and 793 transitions. [2021-07-09 17:21:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:21:37,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:37,903 INFO L225 Difference]: With dead ends: 298 [2021-07-09 17:21:37,903 INFO L226 Difference]: Without dead ends: 288 [2021-07-09 17:21:37,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:21:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-09 17:21:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 213. [2021-07-09 17:21:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.910377358490566) internal successors, (617), 212 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 617 transitions. [2021-07-09 17:21:37,907 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 617 transitions. Word has length 16 [2021-07-09 17:21:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 617 transitions. [2021-07-09 17:21:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 617 transitions. [2021-07-09 17:21:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:37,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:37,908 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:38,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-07-09 17:21:38,127 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash -902455397, now seen corresponding path program 65 times [2021-07-09 17:21:38,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:38,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336222906] [2021-07-09 17:21:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:38,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336222906] [2021-07-09 17:21:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336222906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442310642] [2021-07-09 17:21:38,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:38,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:38,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:38,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:38,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:38,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:38,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:38,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:38,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442310642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:38,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:38,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:38,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983165214] [2021-07-09 17:21:38,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:38,398 INFO L87 Difference]: Start difference. First operand 213 states and 617 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:38,561 INFO L93 Difference]: Finished difference Result 275 states and 774 transitions. [2021-07-09 17:21:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:38,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:38,562 INFO L225 Difference]: With dead ends: 275 [2021-07-09 17:21:38,562 INFO L226 Difference]: Without dead ends: 259 [2021-07-09 17:21:38,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-07-09 17:21:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 241. [2021-07-09 17:21:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.9625) internal successors, (711), 240 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 711 transitions. [2021-07-09 17:21:38,566 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 711 transitions. Word has length 16 [2021-07-09 17:21:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:38,566 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 711 transitions. [2021-07-09 17:21:38,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 711 transitions. [2021-07-09 17:21:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:38,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:38,567 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:38,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:38,784 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:38,784 INFO L82 PathProgramCache]: Analyzing trace with hash -43580867, now seen corresponding path program 66 times [2021-07-09 17:21:38,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:38,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965093376] [2021-07-09 17:21:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:38,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965093376] [2021-07-09 17:21:38,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965093376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013207827] [2021-07-09 17:21:38,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:38,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:38,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:38,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:39,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:39,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:39,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:39,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:39,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:39,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:39,100 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:39,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:39,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013207827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:39,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:39,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431582894] [2021-07-09 17:21:39,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:39,123 INFO L87 Difference]: Start difference. First operand 241 states and 711 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:39,603 INFO L93 Difference]: Finished difference Result 332 states and 894 transitions. [2021-07-09 17:21:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:21:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:39,604 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:21:39,604 INFO L226 Difference]: Without dead ends: 308 [2021-07-09 17:21:39,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:21:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-09 17:21:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 243. [2021-07-09 17:21:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9669421487603307) internal successors, (718), 242 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 718 transitions. [2021-07-09 17:21:39,608 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 718 transitions. Word has length 16 [2021-07-09 17:21:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:39,608 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 718 transitions. [2021-07-09 17:21:39,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 718 transitions. [2021-07-09 17:21:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:39,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:39,609 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:39,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-09 17:21:39,825 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1667032441, now seen corresponding path program 67 times [2021-07-09 17:21:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172672083] [2021-07-09 17:21:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:39,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:39,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172672083] [2021-07-09 17:21:39,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172672083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:39,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690124495] [2021-07-09 17:21:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:40,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:40,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:40,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:40,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:40,130 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:40,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:40,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:40,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690124495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:40,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:40,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:40,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803545333] [2021-07-09 17:21:40,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:40,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:40,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:40,153 INFO L87 Difference]: Start difference. First operand 243 states and 718 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:40,515 INFO L93 Difference]: Finished difference Result 325 states and 881 transitions. [2021-07-09 17:21:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:21:40,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:40,517 INFO L225 Difference]: With dead ends: 325 [2021-07-09 17:21:40,517 INFO L226 Difference]: Without dead ends: 315 [2021-07-09 17:21:40,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:21:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-09 17:21:40,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2021-07-09 17:21:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.9763779527559056) internal successors, (756), 254 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 756 transitions. [2021-07-09 17:21:40,521 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 756 transitions. Word has length 16 [2021-07-09 17:21:40,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:40,521 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 756 transitions. [2021-07-09 17:21:40,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:40,521 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 756 transitions. [2021-07-09 17:21:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:40,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:40,521 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:40,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-09 17:21:40,738 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:40,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:40,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1138529859, now seen corresponding path program 68 times [2021-07-09 17:21:40,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:40,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933525438] [2021-07-09 17:21:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:40,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:40,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933525438] [2021-07-09 17:21:40,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933525438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:40,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975272208] [2021-07-09 17:21:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:40,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:40,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:40,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:40,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:40,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:40,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:41,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:41,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:41,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:41,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:41,049 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:41,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:41,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975272208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:41,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:41,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026876550] [2021-07-09 17:21:41,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:41,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:41,073 INFO L87 Difference]: Start difference. First operand 255 states and 756 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:41,557 INFO L93 Difference]: Finished difference Result 360 states and 966 transitions. [2021-07-09 17:21:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:21:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:41,558 INFO L225 Difference]: With dead ends: 360 [2021-07-09 17:21:41,558 INFO L226 Difference]: Without dead ends: 331 [2021-07-09 17:21:41,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:21:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-07-09 17:21:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 249. [2021-07-09 17:21:41,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.967741935483871) internal successors, (736), 248 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 736 transitions. [2021-07-09 17:21:41,562 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 736 transitions. Word has length 16 [2021-07-09 17:21:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:41,562 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 736 transitions. [2021-07-09 17:21:41,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 736 transitions. [2021-07-09 17:21:41,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:41,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:41,563 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:41,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:41,779 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2083352057, now seen corresponding path program 69 times [2021-07-09 17:21:41,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:41,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761116518] [2021-07-09 17:21:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:41,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:41,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761116518] [2021-07-09 17:21:41,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761116518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:41,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73491337] [2021-07-09 17:21:41,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:41,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:42,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:42,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:42,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:42,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:42,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:42,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:42,112 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:42,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:42,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73491337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:42,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:42,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:42,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217595060] [2021-07-09 17:21:42,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:42,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:42,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:42,134 INFO L87 Difference]: Start difference. First operand 249 states and 736 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:42,452 INFO L93 Difference]: Finished difference Result 305 states and 859 transitions. [2021-07-09 17:21:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:21:42,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:42,453 INFO L225 Difference]: With dead ends: 305 [2021-07-09 17:21:42,453 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 17:21:42,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:21:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 17:21:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 250. [2021-07-09 17:21:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.967871485943775) internal successors, (739), 249 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 739 transitions. [2021-07-09 17:21:42,457 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 739 transitions. Word has length 16 [2021-07-09 17:21:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:42,457 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 739 transitions. [2021-07-09 17:21:42,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 739 transitions. [2021-07-09 17:21:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:42,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:42,457 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:42,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:42,674 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:42,674 INFO L82 PathProgramCache]: Analyzing trace with hash 746546959, now seen corresponding path program 70 times [2021-07-09 17:21:42,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:42,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194167938] [2021-07-09 17:21:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:42,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194167938] [2021-07-09 17:21:42,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194167938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834833205] [2021-07-09 17:21:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:42,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:42,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:42,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:42,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:42,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:42,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:42,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:42,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:42,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834833205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:42,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:42,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366579758] [2021-07-09 17:21:42,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:42,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:42,962 INFO L87 Difference]: Start difference. First operand 250 states and 739 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:43,189 INFO L93 Difference]: Finished difference Result 285 states and 797 transitions. [2021-07-09 17:21:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:21:43,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:43,190 INFO L225 Difference]: With dead ends: 285 [2021-07-09 17:21:43,190 INFO L226 Difference]: Without dead ends: 267 [2021-07-09 17:21:43,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:43,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-07-09 17:21:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 250. [2021-07-09 17:21:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-07-09 17:21:43,194 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-07-09 17:21:43,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:43,194 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-07-09 17:21:43,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:43,194 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-07-09 17:21:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:43,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:43,194 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:43,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-07-09 17:21:43,411 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:43,411 INFO L82 PathProgramCache]: Analyzing trace with hash -881350065, now seen corresponding path program 71 times [2021-07-09 17:21:43,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:43,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40960818] [2021-07-09 17:21:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:43,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:43,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40960818] [2021-07-09 17:21:43,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40960818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:43,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542146306] [2021-07-09 17:21:43,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:43,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:43,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:43,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:43,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:43,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:43,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:43,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:43,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:43,718 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:43,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:43,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:43,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542146306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:43,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:43,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655440971] [2021-07-09 17:21:43,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:43,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:43,740 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:44,214 INFO L93 Difference]: Finished difference Result 335 states and 919 transitions. [2021-07-09 17:21:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:21:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:44,216 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:21:44,216 INFO L226 Difference]: Without dead ends: 325 [2021-07-09 17:21:44,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:21:44,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-07-09 17:21:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 250. [2021-07-09 17:21:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.959839357429719) internal successors, (737), 249 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 737 transitions. [2021-07-09 17:21:44,219 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 737 transitions. Word has length 16 [2021-07-09 17:21:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:44,220 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 737 transitions. [2021-07-09 17:21:44,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 737 transitions. [2021-07-09 17:21:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:44,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:44,220 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:44,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:44,433 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1910944715, now seen corresponding path program 72 times [2021-07-09 17:21:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:44,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059487804] [2021-07-09 17:21:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:44,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:44,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059487804] [2021-07-09 17:21:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059487804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:44,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726821209] [2021-07-09 17:21:44,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:44,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:44,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:44,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:44,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:44,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:44,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:44,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:44,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:44,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-09 17:21:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:44,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726821209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:44,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:44,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:44,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921364395] [2021-07-09 17:21:44,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:44,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:44,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:44,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:44,734 INFO L87 Difference]: Start difference. First operand 250 states and 737 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:44,934 INFO L93 Difference]: Finished difference Result 306 states and 878 transitions. [2021-07-09 17:21:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:44,935 INFO L225 Difference]: With dead ends: 306 [2021-07-09 17:21:44,935 INFO L226 Difference]: Without dead ends: 292 [2021-07-09 17:21:44,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-07-09 17:21:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 277. [2021-07-09 17:21:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0) internal successors, (828), 276 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 828 transitions. [2021-07-09 17:21:44,940 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 828 transitions. Word has length 16 [2021-07-09 17:21:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:44,940 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 828 transitions. [2021-07-09 17:21:44,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 828 transitions. [2021-07-09 17:21:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:44,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:44,940 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:45,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable742,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:45,150 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1525148051, now seen corresponding path program 73 times [2021-07-09 17:21:45,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:45,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537912526] [2021-07-09 17:21:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:45,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537912526] [2021-07-09 17:21:45,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537912526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:45,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044430674] [2021-07-09 17:21:45,211 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:45,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:45,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:45,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:45,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:45,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:45,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:45,506 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:45,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:45,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:45,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044430674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:45,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:45,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654372681] [2021-07-09 17:21:45,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:45,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:45,529 INFO L87 Difference]: Start difference. First operand 277 states and 828 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:46,012 INFO L93 Difference]: Finished difference Result 356 states and 998 transitions. [2021-07-09 17:21:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:21:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:46,014 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:21:46,014 INFO L226 Difference]: Without dead ends: 346 [2021-07-09 17:21:46,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:21:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-09 17:21:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 279. [2021-07-09 17:21:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0071942446043165) internal successors, (836), 278 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 836 transitions. [2021-07-09 17:21:46,018 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 836 transitions. Word has length 16 [2021-07-09 17:21:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:46,018 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 836 transitions. [2021-07-09 17:21:46,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 836 transitions. [2021-07-09 17:21:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:46,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:46,019 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:46,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-07-09 17:21:46,219 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash 185465257, now seen corresponding path program 74 times [2021-07-09 17:21:46,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:46,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663758761] [2021-07-09 17:21:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:46,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663758761] [2021-07-09 17:21:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663758761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058500569] [2021-07-09 17:21:46,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:46,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:46,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:46,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:46,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:46,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:46,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:46,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:46,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:46,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:46,560 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:46,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:46,560 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:46,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058500569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:46,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:46,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:46,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202044380] [2021-07-09 17:21:46,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:46,582 INFO L87 Difference]: Start difference. First operand 279 states and 836 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:47,094 INFO L93 Difference]: Finished difference Result 370 states and 1018 transitions. [2021-07-09 17:21:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:21:47,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:47,096 INFO L225 Difference]: With dead ends: 370 [2021-07-09 17:21:47,096 INFO L226 Difference]: Without dead ends: 360 [2021-07-09 17:21:47,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:21:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-09 17:21:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 293. [2021-07-09 17:21:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0205479452054793) internal successors, (882), 292 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 882 transitions. [2021-07-09 17:21:47,110 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 882 transitions. Word has length 16 [2021-07-09 17:21:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:47,110 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 882 transitions. [2021-07-09 17:21:47,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 882 transitions. [2021-07-09 17:21:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:47,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:47,110 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:47,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-07-09 17:21:47,326 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:47,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1674870253, now seen corresponding path program 75 times [2021-07-09 17:21:47,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:47,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851767056] [2021-07-09 17:21:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:47,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:47,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851767056] [2021-07-09 17:21:47,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851767056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:47,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821742947] [2021-07-09 17:21:47,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:47,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:47,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:47,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:47,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:47,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:47,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:47,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:47,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:47,741 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:47,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:47,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:47,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821742947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:47,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:47,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434950287] [2021-07-09 17:21:47,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:47,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:47,764 INFO L87 Difference]: Start difference. First operand 293 states and 882 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:48,213 INFO L93 Difference]: Finished difference Result 377 states and 1037 transitions. [2021-07-09 17:21:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:21:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:48,215 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:21:48,215 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 17:21:48,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 418.7ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:21:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 17:21:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 298. [2021-07-09 17:21:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0134680134680134) internal successors, (895), 297 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 895 transitions. [2021-07-09 17:21:48,221 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 895 transitions. Word has length 16 [2021-07-09 17:21:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:48,221 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 895 transitions. [2021-07-09 17:21:48,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:48,221 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 895 transitions. [2021-07-09 17:21:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:48,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:48,222 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:48,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:48,446 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash 601784873, now seen corresponding path program 76 times [2021-07-09 17:21:48,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:48,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974944010] [2021-07-09 17:21:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:48,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:48,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974944010] [2021-07-09 17:21:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974944010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:48,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642575979] [2021-07-09 17:21:48,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:48,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:48,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:48,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:48,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:48,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:48,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:48,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:48,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:48,763 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:48,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:48,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:48,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642575979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:48,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:48,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:48,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186526658] [2021-07-09 17:21:48,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:48,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:48,787 INFO L87 Difference]: Start difference. First operand 298 states and 895 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:49,352 INFO L93 Difference]: Finished difference Result 410 states and 1106 transitions. [2021-07-09 17:21:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:21:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:49,355 INFO L225 Difference]: With dead ends: 410 [2021-07-09 17:21:49,355 INFO L226 Difference]: Without dead ends: 395 [2021-07-09 17:21:49,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 535.3ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:21:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-09 17:21:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 297. [2021-07-09 17:21:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.027027027027027) internal successors, (896), 296 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 896 transitions. [2021-07-09 17:21:49,361 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 896 transitions. Word has length 16 [2021-07-09 17:21:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:49,361 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 896 transitions. [2021-07-09 17:21:49,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 896 transitions. [2021-07-09 17:21:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:21:49,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:49,362 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:49,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-07-09 17:21:49,583 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1695876461, now seen corresponding path program 77 times [2021-07-09 17:21:49,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:49,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636520076] [2021-07-09 17:21:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:49,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:49,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636520076] [2021-07-09 17:21:49,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636520076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:49,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849468878] [2021-07-09 17:21:49,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:49,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:21:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:49,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:21:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:49,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:49,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-09 17:21:49,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 17:21:49,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:49,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-09 17:21:49,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:49,923 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 17:21:49,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:21:49,923 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:58, output treesize:15 [2021-07-09 17:21:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:49,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849468878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:49,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:49,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:49,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176204270] [2021-07-09 17:21:49,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:49,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:49,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:49,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:49,945 INFO L87 Difference]: Start difference. First operand 297 states and 896 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:50,357 INFO L93 Difference]: Finished difference Result 367 states and 1051 transitions. [2021-07-09 17:21:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:21:50,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:21:50,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:50,359 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:21:50,359 INFO L226 Difference]: Without dead ends: 362 [2021-07-09 17:21:50,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:21:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-09 17:21:50,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 299. [2021-07-09 17:21:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0167785234899327) internal successors, (899), 298 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:50,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 899 transitions. [2021-07-09 17:21:50,363 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 899 transitions. Word has length 16 [2021-07-09 17:21:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:50,363 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 899 transitions. [2021-07-09 17:21:50,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 899 transitions. [2021-07-09 17:21:50,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:50,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:50,364 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:50,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:50,574 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash 576133811, now seen corresponding path program 78 times [2021-07-09 17:21:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:50,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269898250] [2021-07-09 17:21:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:50,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:50,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269898250] [2021-07-09 17:21:50,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269898250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:50,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855734042] [2021-07-09 17:21:50,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:50,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:50,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:50,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:50,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:50,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:50,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:50,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:50,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855734042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:50,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:50,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:50,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274404934] [2021-07-09 17:21:50,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:50,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:50,911 INFO L87 Difference]: Start difference. First operand 299 states and 899 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:51,219 INFO L93 Difference]: Finished difference Result 348 states and 996 transitions. [2021-07-09 17:21:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:51,221 INFO L225 Difference]: With dead ends: 348 [2021-07-09 17:21:51,221 INFO L226 Difference]: Without dead ends: 337 [2021-07-09 17:21:51,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:21:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-07-09 17:21:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 304. [2021-07-09 17:21:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-07-09 17:21:51,225 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 17 [2021-07-09 17:21:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:51,225 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-07-09 17:21:51,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-07-09 17:21:51,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:51,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:51,226 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:51,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:51,442 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:51,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:51,442 INFO L82 PathProgramCache]: Analyzing trace with hash 726231765, now seen corresponding path program 79 times [2021-07-09 17:21:51,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:51,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085242205] [2021-07-09 17:21:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:51,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:51,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085242205] [2021-07-09 17:21:51,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085242205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073193665] [2021-07-09 17:21:51,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:51,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:51,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:51,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:51,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:51,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:51,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:51,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073193665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:51,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:51,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:51,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254446262] [2021-07-09 17:21:51,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:51,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:51,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:51,728 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:51,959 INFO L93 Difference]: Finished difference Result 394 states and 1062 transitions. [2021-07-09 17:21:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:51,961 INFO L225 Difference]: With dead ends: 394 [2021-07-09 17:21:51,962 INFO L226 Difference]: Without dead ends: 385 [2021-07-09 17:21:51,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-09 17:21:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 306. [2021-07-09 17:21:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-07-09 17:21:51,967 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-07-09 17:21:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:51,967 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-07-09 17:21:51,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-07-09 17:21:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:51,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:51,968 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:52,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:52,179 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash -999247693, now seen corresponding path program 80 times [2021-07-09 17:21:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:52,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975523392] [2021-07-09 17:21:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:52,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975523392] [2021-07-09 17:21:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975523392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:52,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181857650] [2021-07-09 17:21:52,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:52,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:52,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:52,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:52,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:52,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:52,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181857650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:52,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:52,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407225851] [2021-07-09 17:21:52,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:52,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:52,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:52,492 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:52,743 INFO L93 Difference]: Finished difference Result 393 states and 1076 transitions. [2021-07-09 17:21:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:21:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:52,744 INFO L225 Difference]: With dead ends: 393 [2021-07-09 17:21:52,744 INFO L226 Difference]: Without dead ends: 388 [2021-07-09 17:21:52,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-09 17:21:52,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 306. [2021-07-09 17:21:52,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-07-09 17:21:52,749 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 17 [2021-07-09 17:21:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:52,749 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-07-09 17:21:52,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-07-09 17:21:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:52,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:52,750 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:52,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-07-09 17:21:52,966 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1659695474, now seen corresponding path program 81 times [2021-07-09 17:21:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:52,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775525601] [2021-07-09 17:21:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:52,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:52,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775525601] [2021-07-09 17:21:52,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775525601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:52,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564424013] [2021-07-09 17:21:52,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:53,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:21:53,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:21:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:53,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564424013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:53,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:53,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:21:53,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183552776] [2021-07-09 17:21:53,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:21:53,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:21:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:21:53,043 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:53,080 INFO L93 Difference]: Finished difference Result 469 states and 1200 transitions. [2021-07-09 17:21:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:21:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:53,082 INFO L225 Difference]: With dead ends: 469 [2021-07-09 17:21:53,082 INFO L226 Difference]: Without dead ends: 469 [2021-07-09 17:21:53,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-09 17:21:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 312. [2021-07-09 17:21:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0160771704180065) internal successors, (938), 311 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) [2021-07-09 17:21:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 938 transitions. [2021-07-09 17:21:53,086 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 938 transitions. Word has length 17 [2021-07-09 17:21:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:53,086 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 938 transitions. [2021-07-09 17:21:53,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 938 transitions. [2021-07-09 17:21:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:53,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:53,087 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:53,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:53,303 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:53,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1013855483, now seen corresponding path program 82 times [2021-07-09 17:21:53,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:53,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834395807] [2021-07-09 17:21:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:53,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:53,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834395807] [2021-07-09 17:21:53,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834395807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:53,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104327970] [2021-07-09 17:21:53,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:53,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:53,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:53,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:53,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:53,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:53,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:53,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104327970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:53,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:53,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787873824] [2021-07-09 17:21:53,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:53,627 INFO L87 Difference]: Start difference. First operand 312 states and 938 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:53,882 INFO L93 Difference]: Finished difference Result 389 states and 1080 transitions. [2021-07-09 17:21:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:21:53,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:53,884 INFO L225 Difference]: With dead ends: 389 [2021-07-09 17:21:53,884 INFO L226 Difference]: Without dead ends: 384 [2021-07-09 17:21:53,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-07-09 17:21:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-07-09 17:21:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.022364217252396) internal successors, (946), 313 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 946 transitions. [2021-07-09 17:21:53,889 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 946 transitions. Word has length 17 [2021-07-09 17:21:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:53,889 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 946 transitions. [2021-07-09 17:21:53,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 946 transitions. [2021-07-09 17:21:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:53,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:53,890 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:54,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:54,106 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:54,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1555632355, now seen corresponding path program 83 times [2021-07-09 17:21:54,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:54,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677367704] [2021-07-09 17:21:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:54,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677367704] [2021-07-09 17:21:54,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677367704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932230933] [2021-07-09 17:21:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:54,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:21:54,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:54,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:54,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:54,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:54,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:54,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:54,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:54,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:54,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932230933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:54,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735733664] [2021-07-09 17:21:54,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:54,409 INFO L87 Difference]: Start difference. First operand 314 states and 946 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:54,637 INFO L93 Difference]: Finished difference Result 398 states and 1096 transitions. [2021-07-09 17:21:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:21:54,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:54,639 INFO L225 Difference]: With dead ends: 398 [2021-07-09 17:21:54,639 INFO L226 Difference]: Without dead ends: 389 [2021-07-09 17:21:54,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:21:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-09 17:21:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 316. [2021-07-09 17:21:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-07-09 17:21:54,643 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-07-09 17:21:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:54,643 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-07-09 17:21:54,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-07-09 17:21:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:54,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:54,644 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-07-09 17:21:54,860 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1249929945, now seen corresponding path program 84 times [2021-07-09 17:21:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139485312] [2021-07-09 17:21:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:54,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:54,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139485312] [2021-07-09 17:21:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139485312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:54,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616992262] [2021-07-09 17:21:54,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:54,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:21:54,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:54,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:54,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:55,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:55,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:55,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:55,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:55,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:55,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616992262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:55,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:55,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:55,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071355994] [2021-07-09 17:21:55,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:55,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:55,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:55,174 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:55,358 INFO L93 Difference]: Finished difference Result 377 states and 1066 transitions. [2021-07-09 17:21:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:21:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:55,359 INFO L225 Difference]: With dead ends: 377 [2021-07-09 17:21:55,359 INFO L226 Difference]: Without dead ends: 372 [2021-07-09 17:21:55,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:21:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-09 17:21:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 316. [2021-07-09 17:21:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.015873015873016) internal successors, (950), 315 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 950 transitions. [2021-07-09 17:21:55,364 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 950 transitions. Word has length 17 [2021-07-09 17:21:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:55,364 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 950 transitions. [2021-07-09 17:21:55,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 950 transitions. [2021-07-09 17:21:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:55,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,365 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:55,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:55,581 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:55,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2141251576, now seen corresponding path program 85 times [2021-07-09 17:21:55,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:55,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116113659] [2021-07-09 17:21:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:55,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116113659] [2021-07-09 17:21:55,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116113659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:55,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691816168] [2021-07-09 17:21:55,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:21:55,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691816168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:55,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:55,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:21:55,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122239958] [2021-07-09 17:21:55,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:21:55,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:21:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:55,667 INFO L87 Difference]: Start difference. First operand 316 states and 950 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:55,725 INFO L93 Difference]: Finished difference Result 509 states and 1289 transitions. [2021-07-09 17:21:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:21:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:55,727 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:21:55,727 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:21:55,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:21:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 312. [2021-07-09 17:21:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-07-09 17:21:55,732 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 17 [2021-07-09 17:21:55,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:55,732 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-07-09 17:21:55,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-07-09 17:21:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:55,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:55,733 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:55,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1126,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:55,949 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1196751859, now seen corresponding path program 86 times [2021-07-09 17:21:55,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:55,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298340606] [2021-07-09 17:21:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:55,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:55,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298340606] [2021-07-09 17:21:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298340606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:55,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248205074] [2021-07-09 17:21:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:21:56,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:56,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248205074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:56,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-07-09 17:21:56,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278738541] [2021-07-09 17:21:56,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:21:56,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:21:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:21:56,229 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:56,403 INFO L93 Difference]: Finished difference Result 345 states and 992 transitions. [2021-07-09 17:21:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:21:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:56,404 INFO L225 Difference]: With dead ends: 345 [2021-07-09 17:21:56,404 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:21:56,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:21:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 313. [2021-07-09 17:21:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0096153846153846) internal successors, (939), 312 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 939 transitions. [2021-07-09 17:21:56,419 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 939 transitions. Word has length 17 [2021-07-09 17:21:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:56,420 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 939 transitions. [2021-07-09 17:21:56,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 939 transitions. [2021-07-09 17:21:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:56,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:56,420 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:56,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1127 [2021-07-09 17:21:56,621 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1148286481, now seen corresponding path program 87 times [2021-07-09 17:21:56,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:56,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020565246] [2021-07-09 17:21:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020565246] [2021-07-09 17:21:56,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020565246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172946948] [2021-07-09 17:21:56,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:56,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:21:56,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:56,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:56,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:56,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:56,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:56,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172946948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:56,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:56,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:56,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32993567] [2021-07-09 17:21:56,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:56,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:56,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:56,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:56,904 INFO L87 Difference]: Start difference. First operand 313 states and 939 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,184 INFO L93 Difference]: Finished difference Result 386 states and 1054 transitions. [2021-07-09 17:21:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:21:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,186 INFO L225 Difference]: With dead ends: 386 [2021-07-09 17:21:57,186 INFO L226 Difference]: Without dead ends: 363 [2021-07-09 17:21:57,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:21:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-07-09 17:21:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 313. [2021-07-09 17:21:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-07-09 17:21:57,190 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 17 [2021-07-09 17:21:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:57,190 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-07-09 17:21:57,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-07-09 17:21:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:57,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:57,191 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:57,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-07-09 17:21:57,407 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 878014677, now seen corresponding path program 88 times [2021-07-09 17:21:57,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:57,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320424431] [2021-07-09 17:21:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:57,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320424431] [2021-07-09 17:21:57,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320424431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944930962] [2021-07-09 17:21:57,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:57,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:21:57,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:57,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:57,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:57,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:57,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:57,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:57,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:57,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:57,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944930962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:57,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:57,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:57,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183756704] [2021-07-09 17:21:57,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:57,707 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:57,923 INFO L93 Difference]: Finished difference Result 367 states and 1032 transitions. [2021-07-09 17:21:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:21:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:57,925 INFO L225 Difference]: With dead ends: 367 [2021-07-09 17:21:57,925 INFO L226 Difference]: Without dead ends: 358 [2021-07-09 17:21:57,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-09 17:21:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 312. [2021-07-09 17:21:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.987138263665595) internal successors, (929), 311 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 929 transitions. [2021-07-09 17:21:57,929 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 929 transitions. Word has length 17 [2021-07-09 17:21:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:57,929 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 929 transitions. [2021-07-09 17:21:57,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 929 transitions. [2021-07-09 17:21:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:57,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:57,930 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-07-09 17:21:58,145 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -847464781, now seen corresponding path program 89 times [2021-07-09 17:21:58,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470816003] [2021-07-09 17:21:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:21:58,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470816003] [2021-07-09 17:21:58,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470816003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418522175] [2021-07-09 17:21:58,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:21:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:58,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:58,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:58,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:58,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418522175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:58,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:21:58,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286643399] [2021-07-09 17:21:58,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:21:58,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:58,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:21:58,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:21:58,437 INFO L87 Difference]: Start difference. First operand 312 states and 929 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:58,663 INFO L93 Difference]: Finished difference Result 358 states and 1007 transitions. [2021-07-09 17:21:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:21:58,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:58,664 INFO L225 Difference]: With dead ends: 358 [2021-07-09 17:21:58,664 INFO L226 Difference]: Without dead ends: 353 [2021-07-09 17:21:58,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:21:58,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-09 17:21:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 310. [2021-07-09 17:21:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9967637540453076) internal successors, (926), 309 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 926 transitions. [2021-07-09 17:21:58,668 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 926 transitions. Word has length 17 [2021-07-09 17:21:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:58,668 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 926 transitions. [2021-07-09 17:21:58,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 926 transitions. [2021-07-09 17:21:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:58,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:58,669 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:58,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1193 [2021-07-09 17:21:58,885 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:58,885 INFO L82 PathProgramCache]: Analyzing trace with hash 641940215, now seen corresponding path program 90 times [2021-07-09 17:21:58,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:58,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500890096] [2021-07-09 17:21:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:58,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500890096] [2021-07-09 17:21:58,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500890096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611735534] [2021-07-09 17:21:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:58,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:21:58,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:21:58,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:21:58,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:59,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:21:59,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:21:59,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:21:59,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:21:59,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:21:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611735534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:21:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659505964] [2021-07-09 17:21:59,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:21:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:21:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:21:59,196 INFO L87 Difference]: Start difference. First operand 310 states and 926 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:59,524 INFO L93 Difference]: Finished difference Result 390 states and 1052 transitions. [2021-07-09 17:21:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:21:59,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:59,525 INFO L225 Difference]: With dead ends: 390 [2021-07-09 17:21:59,525 INFO L226 Difference]: Without dead ends: 367 [2021-07-09 17:21:59,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:21:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-07-09 17:21:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 308. [2021-07-09 17:21:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.96742671009772) internal successors, (911), 307 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 911 transitions. [2021-07-09 17:21:59,530 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 911 transitions. Word has length 17 [2021-07-09 17:21:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:59,530 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 911 transitions. [2021-07-09 17:21:59,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 911 transitions. [2021-07-09 17:21:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:59,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:59,531 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:21:59,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1218,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:59,748 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:21:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:21:59,748 INFO L82 PathProgramCache]: Analyzing trace with hash -249381416, now seen corresponding path program 91 times [2021-07-09 17:21:59,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:21:59,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081635654] [2021-07-09 17:21:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:21:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:21:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081635654] [2021-07-09 17:21:59,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081635654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602309935] [2021-07-09 17:21:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:21:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:21:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:21:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:21:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:21:59,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602309935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:21:59,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:21:59,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:21:59,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001573322] [2021-07-09 17:21:59,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:21:59,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:21:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:21:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:21:59,827 INFO L87 Difference]: Start difference. First operand 308 states and 911 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:21:59,880 INFO L93 Difference]: Finished difference Result 461 states and 1184 transitions. [2021-07-09 17:21:59,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:21:59,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:21:59,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:21:59,882 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:21:59,882 INFO L226 Difference]: Without dead ends: 461 [2021-07-09 17:21:59,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:21:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-09 17:21:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 321. [2021-07-09 17:21:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-07-09 17:21:59,886 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-07-09 17:21:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:21:59,887 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-07-09 17:21:59,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:21:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-07-09 17:21:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:21:59,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:21:59,887 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-07-09 17:22:00,102 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,103 INFO L82 PathProgramCache]: Analyzing trace with hash -431145165, now seen corresponding path program 92 times [2021-07-09 17:22:00,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389053925] [2021-07-09 17:22:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389053925] [2021-07-09 17:22:00,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389053925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629913259] [2021-07-09 17:22:00,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:00,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:00,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:00,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:00,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:00,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:00,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629913259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:00,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249767823] [2021-07-09 17:22:00,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:00,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:00,397 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:00,648 INFO L93 Difference]: Finished difference Result 404 states and 1118 transitions. [2021-07-09 17:22:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:00,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:00,649 INFO L225 Difference]: With dead ends: 404 [2021-07-09 17:22:00,649 INFO L226 Difference]: Without dead ends: 399 [2021-07-09 17:22:00,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:00,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-07-09 17:22:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 321. [2021-07-09 17:22:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.98125) internal successors, (954), 320 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 954 transitions. [2021-07-09 17:22:00,653 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 954 transitions. Word has length 17 [2021-07-09 17:22:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:00,653 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 954 transitions. [2021-07-09 17:22:00,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 954 transitions. [2021-07-09 17:22:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:00,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:00,654 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:00,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-07-09 17:22:00,860 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash 288474162, now seen corresponding path program 93 times [2021-07-09 17:22:00,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:00,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670942466] [2021-07-09 17:22:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:00,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670942466] [2021-07-09 17:22:00,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670942466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460295953] [2021-07-09 17:22:00,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:00,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:00,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:00,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:00,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:00,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460295953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:00,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:00,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851706249] [2021-07-09 17:22:00,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:00,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:00,986 INFO L87 Difference]: Start difference. First operand 321 states and 954 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:01,063 INFO L93 Difference]: Finished difference Result 535 states and 1451 transitions. [2021-07-09 17:22:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:01,065 INFO L225 Difference]: With dead ends: 535 [2021-07-09 17:22:01,065 INFO L226 Difference]: Without dead ends: 535 [2021-07-09 17:22:01,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-09 17:22:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 405. [2021-07-09 17:22:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.027227722772277) internal successors, (1223), 404 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1223 transitions. [2021-07-09 17:22:01,073 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1223 transitions. Word has length 17 [2021-07-09 17:22:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:01,073 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1223 transitions. [2021-07-09 17:22:01,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1223 transitions. [2021-07-09 17:22:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:01,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:01,091 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:01,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1265 [2021-07-09 17:22:01,305 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1767950263, now seen corresponding path program 94 times [2021-07-09 17:22:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268808607] [2021-07-09 17:22:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268808607] [2021-07-09 17:22:01,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268808607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779121245] [2021-07-09 17:22:01,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:01,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:01,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:01,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:01,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:01,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:01,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:01,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:01,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779121245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:01,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:01,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325328789] [2021-07-09 17:22:01,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:01,595 INFO L87 Difference]: Start difference. First operand 405 states and 1223 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:01,826 INFO L93 Difference]: Finished difference Result 449 states and 1310 transitions. [2021-07-09 17:22:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:01,827 INFO L225 Difference]: With dead ends: 449 [2021-07-09 17:22:01,827 INFO L226 Difference]: Without dead ends: 439 [2021-07-09 17:22:01,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-09 17:22:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 408. [2021-07-09 17:22:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.022113022113022) internal successors, (1230), 407 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1230 transitions. [2021-07-09 17:22:01,848 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1230 transitions. Word has length 17 [2021-07-09 17:22:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1230 transitions. [2021-07-09 17:22:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1230 transitions. [2021-07-09 17:22:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:01,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:01,849 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1266,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:02,071 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash 899120009, now seen corresponding path program 95 times [2021-07-09 17:22:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177470467] [2021-07-09 17:22:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177470467] [2021-07-09 17:22:02,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177470467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035165239] [2021-07-09 17:22:02,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:02,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:02,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:02,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:02,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:02,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:02,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:02,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:02,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:02,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035165239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:02,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:02,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824989961] [2021-07-09 17:22:02,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:02,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:02,416 INFO L87 Difference]: Start difference. First operand 408 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:02,644 INFO L93 Difference]: Finished difference Result 472 states and 1325 transitions. [2021-07-09 17:22:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:02,646 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:22:02,646 INFO L226 Difference]: Without dead ends: 459 [2021-07-09 17:22:02,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:02,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-07-09 17:22:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 408. [2021-07-09 17:22:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-07-09 17:22:02,651 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-07-09 17:22:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:02,651 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-07-09 17:22:02,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-07-09 17:22:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:02,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:02,652 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:02,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1292 [2021-07-09 17:22:02,869 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash -603552507, now seen corresponding path program 96 times [2021-07-09 17:22:02,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:02,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358133044] [2021-07-09 17:22:02,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:02,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:02,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358133044] [2021-07-09 17:22:02,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358133044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:02,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673837072] [2021-07-09 17:22:02,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:03,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:03,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:03,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:03,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:03,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:03,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673837072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:03,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:03,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835066429] [2021-07-09 17:22:03,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:03,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:03,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:03,235 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:03,449 INFO L93 Difference]: Finished difference Result 440 states and 1285 transitions. [2021-07-09 17:22:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:03,451 INFO L225 Difference]: With dead ends: 440 [2021-07-09 17:22:03,451 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:22:03,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:22:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 408. [2021-07-09 17:22:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-07-09 17:22:03,457 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-07-09 17:22:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:03,457 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-07-09 17:22:03,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-07-09 17:22:03,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:03,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:03,458 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:03,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,678 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:03,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1965935331, now seen corresponding path program 97 times [2021-07-09 17:22:03,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:03,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829661648] [2021-07-09 17:22:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:03,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829661648] [2021-07-09 17:22:03,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829661648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274873000] [2021-07-09 17:22:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:03,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:03,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:04,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:04,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:04,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:04,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274873000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:04,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295943362] [2021-07-09 17:22:04,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:04,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:04,039 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,241 INFO L93 Difference]: Finished difference Result 447 states and 1289 transitions. [2021-07-09 17:22:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:04,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,242 INFO L225 Difference]: With dead ends: 447 [2021-07-09 17:22:04,242 INFO L226 Difference]: Without dead ends: 442 [2021-07-09 17:22:04,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-09 17:22:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 408. [2021-07-09 17:22:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-07-09 17:22:04,248 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-07-09 17:22:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,248 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-07-09 17:22:04,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-07-09 17:22:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:04,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,248 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:04,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1348 [2021-07-09 17:22:04,466 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash -839626969, now seen corresponding path program 98 times [2021-07-09 17:22:04,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:04,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291102753] [2021-07-09 17:22:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:04,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291102753] [2021-07-09 17:22:04,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291102753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961815584] [2021-07-09 17:22:04,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:04,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:04,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:04,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:04,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:04,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:04,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:04,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:04,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:04,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961815584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:04,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:04,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:04,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502520468] [2021-07-09 17:22:04,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:04,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:04,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:04,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:04,763 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:04,979 INFO L93 Difference]: Finished difference Result 462 states and 1322 transitions. [2021-07-09 17:22:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:04,980 INFO L225 Difference]: With dead ends: 462 [2021-07-09 17:22:04,980 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:22:04,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:22:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:22:04,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 408. [2021-07-09 17:22:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0098280098280097) internal successors, (1225), 407 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1225 transitions. [2021-07-09 17:22:04,985 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1225 transitions. Word has length 17 [2021-07-09 17:22:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:04,986 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1225 transitions. [2021-07-09 17:22:04,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1225 transitions. [2021-07-09 17:22:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:04,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:04,986 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-07-09 17:22:05,203 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1912712349, now seen corresponding path program 99 times [2021-07-09 17:22:05,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263540710] [2021-07-09 17:22:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263540710] [2021-07-09 17:22:05,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263540710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603049591] [2021-07-09 17:22:05,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:05,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:22:05,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:05,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:05,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:05,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:05,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:05,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603049591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:05,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:05,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:05,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715895954] [2021-07-09 17:22:05,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:05,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:05,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:05,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:05,515 INFO L87 Difference]: Start difference. First operand 408 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:05,754 INFO L93 Difference]: Finished difference Result 490 states and 1379 transitions. [2021-07-09 17:22:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:05,755 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:22:05,756 INFO L226 Difference]: Without dead ends: 477 [2021-07-09 17:22:05,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-09 17:22:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 408. [2021-07-09 17:22:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0) internal successors, (1221), 407 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1221 transitions. [2021-07-09 17:22:05,761 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1221 transitions. Word has length 17 [2021-07-09 17:22:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:05,761 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1221 transitions. [2021-07-09 17:22:05,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1221 transitions. [2021-07-09 17:22:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:05,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:05,761 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:05,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-07-09 17:22:05,978 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:05,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1193093022, now seen corresponding path program 100 times [2021-07-09 17:22:05,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:05,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691716886] [2021-07-09 17:22:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691716886] [2021-07-09 17:22:06,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691716886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825970039] [2021-07-09 17:22:06,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:06,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825970039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:06,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:06,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158233469] [2021-07-09 17:22:06,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:06,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:06,063 INFO L87 Difference]: Start difference. First operand 408 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:06,139 INFO L93 Difference]: Finished difference Result 549 states and 1446 transitions. [2021-07-09 17:22:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:06,140 INFO L225 Difference]: With dead ends: 549 [2021-07-09 17:22:06,140 INFO L226 Difference]: Without dead ends: 549 [2021-07-09 17:22:06,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-09 17:22:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 317. [2021-07-09 17:22:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-07-09 17:22:06,151 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-07-09 17:22:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:06,152 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-07-09 17:22:06,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:06,152 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-07-09 17:22:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:06,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:06,152 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-07-09 17:22:06,368 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash -818620761, now seen corresponding path program 101 times [2021-07-09 17:22:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:06,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809925876] [2021-07-09 17:22:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809925876] [2021-07-09 17:22:06,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809925876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105621955] [2021-07-09 17:22:06,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:06,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:06,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:06,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:06,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:06,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:06,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:06,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:06,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:06,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:06,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105621955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:06,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:06,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245324221] [2021-07-09 17:22:06,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:06,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:06,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:06,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:06,805 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:07,080 INFO L93 Difference]: Finished difference Result 398 states and 1075 transitions. [2021-07-09 17:22:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:07,081 INFO L225 Difference]: With dead ends: 398 [2021-07-09 17:22:07,081 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:22:07,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:22:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 317. [2021-07-09 17:22:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9272151898734178) internal successors, (925), 316 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 925 transitions. [2021-07-09 17:22:07,085 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 925 transitions. Word has length 17 [2021-07-09 17:22:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,085 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 925 transitions. [2021-07-09 17:22:07,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 925 transitions. [2021-07-09 17:22:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:07,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,086 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:07,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1427,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,302 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1699439288, now seen corresponding path program 102 times [2021-07-09 17:22:07,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:07,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429688223] [2021-07-09 17:22:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429688223] [2021-07-09 17:22:07,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429688223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546389214] [2021-07-09 17:22:07,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:07,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546389214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:07,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479597677] [2021-07-09 17:22:07,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:07,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:07,395 INFO L87 Difference]: Start difference. First operand 317 states and 925 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:07,499 INFO L93 Difference]: Finished difference Result 478 states and 1278 transitions. [2021-07-09 17:22:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:07,500 INFO L225 Difference]: With dead ends: 478 [2021-07-09 17:22:07,500 INFO L226 Difference]: Without dead ends: 478 [2021-07-09 17:22:07,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-09 17:22:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 361. [2021-07-09 17:22:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9611111111111112) internal successors, (1066), 360 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1066 transitions. [2021-07-09 17:22:07,505 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1066 transitions. Word has length 17 [2021-07-09 17:22:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:07,505 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1066 transitions. [2021-07-09 17:22:07,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1066 transitions. [2021-07-09 17:22:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:07,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:07,505 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:07,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1462,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,721 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash 815564467, now seen corresponding path program 103 times [2021-07-09 17:22:07,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:07,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571723482] [2021-07-09 17:22:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:07,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:07,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571723482] [2021-07-09 17:22:07,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571723482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:07,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763536564] [2021-07-09 17:22:07,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:08,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:08,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763536564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:08,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459379229] [2021-07-09 17:22:08,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:08,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:08,088 INFO L87 Difference]: Start difference. First operand 361 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:08,394 INFO L93 Difference]: Finished difference Result 418 states and 1180 transitions. [2021-07-09 17:22:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:08,395 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:22:08,395 INFO L226 Difference]: Without dead ends: 408 [2021-07-09 17:22:08,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-07-09 17:22:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2021-07-09 17:22:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.967123287671233) internal successors, (1083), 365 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1083 transitions. [2021-07-09 17:22:08,399 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1083 transitions. Word has length 17 [2021-07-09 17:22:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:08,399 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1083 transitions. [2021-07-09 17:22:08,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1083 transitions. [2021-07-09 17:22:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:08,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:08,400 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:08,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-07-09 17:22:08,602 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1764893969, now seen corresponding path program 104 times [2021-07-09 17:22:08,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:08,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958403537] [2021-07-09 17:22:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:08,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958403537] [2021-07-09 17:22:08,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958403537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743038978] [2021-07-09 17:22:08,652 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:08,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:08,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:08,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:08,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:08,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:08,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:08,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:08,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743038978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:08,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:08,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:08,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443824957] [2021-07-09 17:22:08,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:08,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:08,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:08,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:08,864 INFO L87 Difference]: Start difference. First operand 366 states and 1083 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,053 INFO L93 Difference]: Finished difference Result 443 states and 1194 transitions. [2021-07-09 17:22:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:22:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,055 INFO L225 Difference]: With dead ends: 443 [2021-07-09 17:22:09,055 INFO L226 Difference]: Without dead ends: 428 [2021-07-09 17:22:09,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-09 17:22:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 366. [2021-07-09 17:22:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-07-09 17:22:09,059 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-07-09 17:22:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:09,059 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-07-09 17:22:09,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-07-09 17:22:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:09,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:09,060 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:09,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1486,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,276 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:09,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash 712505045, now seen corresponding path program 105 times [2021-07-09 17:22:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:09,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170644757] [2021-07-09 17:22:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:09,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170644757] [2021-07-09 17:22:09,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170644757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442425112] [2021-07-09 17:22:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:09,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:09,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:09,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:09,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:09,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:09,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:09,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:09,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:09,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442425112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:09,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:09,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:09,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096313825] [2021-07-09 17:22:09,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:09,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:09,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:09,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:09,593 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:09,751 INFO L93 Difference]: Finished difference Result 398 states and 1150 transitions. [2021-07-09 17:22:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:09,752 INFO L225 Difference]: With dead ends: 398 [2021-07-09 17:22:09,752 INFO L226 Difference]: Without dead ends: 393 [2021-07-09 17:22:09,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-09 17:22:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 366. [2021-07-09 17:22:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-07-09 17:22:09,758 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-07-09 17:22:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:09,758 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-07-09 17:22:09,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-07-09 17:22:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:09,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:09,759 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:09,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:09,977 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1012974413, now seen corresponding path program 106 times [2021-07-09 17:22:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:09,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691990359] [2021-07-09 17:22:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:10,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691990359] [2021-07-09 17:22:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691990359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962291868] [2021-07-09 17:22:10,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:10,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:10,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:10,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:10,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:10,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:10,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962291868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:10,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:10,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57563449] [2021-07-09 17:22:10,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:10,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:10,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:10,283 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:10,489 INFO L93 Difference]: Finished difference Result 409 states and 1153 transitions. [2021-07-09 17:22:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:10,491 INFO L225 Difference]: With dead ends: 409 [2021-07-09 17:22:10,491 INFO L226 Difference]: Without dead ends: 404 [2021-07-09 17:22:10,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-09 17:22:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 366. [2021-07-09 17:22:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9616438356164383) internal successors, (1081), 365 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1081 transitions. [2021-07-09 17:22:10,497 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1081 transitions. Word has length 17 [2021-07-09 17:22:10,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:10,497 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1081 transitions. [2021-07-09 17:22:10,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1081 transitions. [2021-07-09 17:22:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:10,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:10,498 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:10,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,720 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1645968754, now seen corresponding path program 107 times [2021-07-09 17:22:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:10,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062554773] [2021-07-09 17:22:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:10,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062554773] [2021-07-09 17:22:10,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062554773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723619993] [2021-07-09 17:22:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:10,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:10,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:10,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:10,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723619993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:10,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:10,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058282859] [2021-07-09 17:22:10,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:10,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:10,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:10,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:10,794 INFO L87 Difference]: Start difference. First operand 366 states and 1081 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:10,844 INFO L93 Difference]: Finished difference Result 517 states and 1369 transitions. [2021-07-09 17:22:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:10,845 INFO L225 Difference]: With dead ends: 517 [2021-07-09 17:22:10,845 INFO L226 Difference]: Without dead ends: 517 [2021-07-09 17:22:10,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-09 17:22:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 397. [2021-07-09 17:22:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.9823232323232323) internal successors, (1181), 396 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1181 transitions. [2021-07-09 17:22:10,850 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1181 transitions. Word has length 17 [2021-07-09 17:22:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:10,850 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1181 transitions. [2021-07-09 17:22:10,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1181 transitions. [2021-07-09 17:22:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:10,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:10,851 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:11,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-07-09 17:22:11,067 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash 476430583, now seen corresponding path program 108 times [2021-07-09 17:22:11,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:11,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849960471] [2021-07-09 17:22:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:11,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849960471] [2021-07-09 17:22:11,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849960471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268259233] [2021-07-09 17:22:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:11,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:22:11,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:11,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:11,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:11,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:11,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:11,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:11,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268259233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:11,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493228399] [2021-07-09 17:22:11,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:11,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:11,339 INFO L87 Difference]: Start difference. First operand 397 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:11,606 INFO L93 Difference]: Finished difference Result 450 states and 1270 transitions. [2021-07-09 17:22:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:11,607 INFO L225 Difference]: With dead ends: 450 [2021-07-09 17:22:11,607 INFO L226 Difference]: Without dead ends: 445 [2021-07-09 17:22:11,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-09 17:22:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 399. [2021-07-09 17:22:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.979899497487437) internal successors, (1186), 398 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1186 transitions. [2021-07-09 17:22:11,612 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1186 transitions. Word has length 17 [2021-07-09 17:22:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:11,612 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1186 transitions. [2021-07-09 17:22:11,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1186 transitions. [2021-07-09 17:22:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:11,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:11,613 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:11,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1587 [2021-07-09 17:22:11,825 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash -414891048, now seen corresponding path program 109 times [2021-07-09 17:22:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:11,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654706448] [2021-07-09 17:22:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654706448] [2021-07-09 17:22:11,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654706448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843644646] [2021-07-09 17:22:11,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:11,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843644646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:11,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:11,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584259183] [2021-07-09 17:22:11,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:11,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:11,977 INFO L87 Difference]: Start difference. First operand 399 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:12,034 INFO L93 Difference]: Finished difference Result 520 states and 1374 transitions. [2021-07-09 17:22:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:12,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:12,035 INFO L225 Difference]: With dead ends: 520 [2021-07-09 17:22:12,035 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:22:12,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:22:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-07-09 17:22:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-07-09 17:22:12,040 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-07-09 17:22:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:12,040 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-07-09 17:22:12,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-07-09 17:22:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:12,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:12,041 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:12,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1612 [2021-07-09 17:22:12,258 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash -596654797, now seen corresponding path program 110 times [2021-07-09 17:22:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:12,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571053664] [2021-07-09 17:22:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:12,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:12,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571053664] [2021-07-09 17:22:12,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571053664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430340026] [2021-07-09 17:22:12,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:12,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:12,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:12,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:12,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:12,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:12,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:12,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:12,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430340026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:12,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:12,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:22:12,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068056782] [2021-07-09 17:22:12,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:22:12,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:12,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:22:12,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:12,616 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:12,813 INFO L93 Difference]: Finished difference Result 459 states and 1275 transitions. [2021-07-09 17:22:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:12,829 INFO L225 Difference]: With dead ends: 459 [2021-07-09 17:22:12,829 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:22:12,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:22:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 396. [2021-07-09 17:22:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.969620253164557) internal successors, (1173), 395 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1173 transitions. [2021-07-09 17:22:12,849 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1173 transitions. Word has length 17 [2021-07-09 17:22:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:12,849 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1173 transitions. [2021-07-09 17:22:12,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1173 transitions. [2021-07-09 17:22:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:12,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:12,850 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1613,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,051 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash 122964530, now seen corresponding path program 111 times [2021-07-09 17:22:13,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966822302] [2021-07-09 17:22:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:13,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966822302] [2021-07-09 17:22:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966822302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126203817] [2021-07-09 17:22:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:13,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:13,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:13,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:13,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126203817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:13,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:13,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861065530] [2021-07-09 17:22:13,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:13,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:13,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:13,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:13,135 INFO L87 Difference]: Start difference. First operand 396 states and 1173 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:13,179 INFO L93 Difference]: Finished difference Result 484 states and 1366 transitions. [2021-07-09 17:22:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:13,180 INFO L225 Difference]: With dead ends: 484 [2021-07-09 17:22:13,180 INFO L226 Difference]: Without dead ends: 484 [2021-07-09 17:22:13,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-09 17:22:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 431. [2021-07-09 17:22:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.974418604651163) internal successors, (1279), 430 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1279 transitions. [2021-07-09 17:22:13,185 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1279 transitions. Word has length 17 [2021-07-09 17:22:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:13,185 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1279 transitions. [2021-07-09 17:22:13,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1279 transitions. [2021-07-09 17:22:13,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:13,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:13,186 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:13,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1642 [2021-07-09 17:22:13,402 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:13,402 INFO L82 PathProgramCache]: Analyzing trace with hash 497436791, now seen corresponding path program 112 times [2021-07-09 17:22:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:13,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417683183] [2021-07-09 17:22:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:13,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417683183] [2021-07-09 17:22:13,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417683183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531303938] [2021-07-09 17:22:13,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:13,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:13,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:13,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:13,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:13,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:13,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:13,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:13,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:13,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:13,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531303938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:13,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:13,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:13,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303600716] [2021-07-09 17:22:13,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:13,735 INFO L87 Difference]: Start difference. First operand 431 states and 1279 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:14,008 INFO L93 Difference]: Finished difference Result 508 states and 1390 transitions. [2021-07-09 17:22:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:22:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:14,009 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:22:14,009 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:22:14,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:22:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-07-09 17:22:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.969767441860465) internal successors, (1277), 430 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1277 transitions. [2021-07-09 17:22:14,015 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1277 transitions. Word has length 17 [2021-07-09 17:22:14,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:14,015 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1277 transitions. [2021-07-09 17:22:14,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1277 transitions. [2021-07-09 17:22:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:14,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:14,015 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:14,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1643,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,231 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash -383381736, now seen corresponding path program 113 times [2021-07-09 17:22:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:14,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570686110] [2021-07-09 17:22:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:14,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570686110] [2021-07-09 17:22:14,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570686110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891283279] [2021-07-09 17:22:14,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:14,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891283279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:14,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:14,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420933607] [2021-07-09 17:22:14,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:14,315 INFO L87 Difference]: Start difference. First operand 431 states and 1277 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:14,395 INFO L93 Difference]: Finished difference Result 511 states and 1418 transitions. [2021-07-09 17:22:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:14,397 INFO L225 Difference]: With dead ends: 511 [2021-07-09 17:22:14,397 INFO L226 Difference]: Without dead ends: 511 [2021-07-09 17:22:14,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-09 17:22:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 438. [2021-07-09 17:22:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.9702517162471396) internal successors, (1298), 437 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1298 transitions. [2021-07-09 17:22:14,402 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1298 transitions. Word has length 17 [2021-07-09 17:22:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:14,402 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1298 transitions. [2021-07-09 17:22:14,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1298 transitions. [2021-07-09 17:22:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:14,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:14,403 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:14,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,618 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 54537651, now seen corresponding path program 114 times [2021-07-09 17:22:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:14,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979334954] [2021-07-09 17:22:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:14,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979334954] [2021-07-09 17:22:14,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979334954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993727177] [2021-07-09 17:22:14,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:14,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:14,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:14,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:22:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:14,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-09 17:22:14,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:14,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:14,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:14,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-09 17:22:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:14,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993727177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:14,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:14,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:22:14,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973485197] [2021-07-09 17:22:14,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:22:14,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:14,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:22:14,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:14,958 INFO L87 Difference]: Start difference. First operand 438 states and 1298 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:15,268 INFO L93 Difference]: Finished difference Result 574 states and 1607 transitions. [2021-07-09 17:22:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,270 INFO L225 Difference]: With dead ends: 574 [2021-07-09 17:22:15,270 INFO L226 Difference]: Without dead ends: 569 [2021-07-09 17:22:15,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-07-09 17:22:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 440. [2021-07-09 17:22:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.9635535307517085) internal successors, (1301), 439 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1301 transitions. [2021-07-09 17:22:15,276 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1301 transitions. Word has length 17 [2021-07-09 17:22:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:15,276 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1301 transitions. [2021-07-09 17:22:15,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1301 transitions. [2021-07-09 17:22:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:22:15,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:15,276 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:15,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-07-09 17:22:15,492 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1099753202, now seen corresponding path program 115 times [2021-07-09 17:22:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045355959] [2021-07-09 17:22:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045355959] [2021-07-09 17:22:15,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045355959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690304266] [2021-07-09 17:22:15,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:22:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690304266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:15,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:15,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437165305] [2021-07-09 17:22:15,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:15,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:15,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:15,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:15,579 INFO L87 Difference]: Start difference. First operand 440 states and 1301 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:15,691 INFO L93 Difference]: Finished difference Result 560 states and 1538 transitions. [2021-07-09 17:22:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:22:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:15,692 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:22:15,692 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:22:15,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:22:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:22:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 454. [2021-07-09 17:22:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.964679911699779) internal successors, (1343), 453 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1343 transitions. [2021-07-09 17:22:15,698 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1343 transitions. Word has length 17 [2021-07-09 17:22:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:15,698 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1343 transitions. [2021-07-09 17:22:15,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1343 transitions. [2021-07-09 17:22:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:15,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:15,699 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:15,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:15,915 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash -63868743, now seen corresponding path program 116 times [2021-07-09 17:22:15,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:15,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201844818] [2021-07-09 17:22:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:15,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:15,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201844818] [2021-07-09 17:22:15,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201844818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:15,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229329846] [2021-07-09 17:22:15,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:15,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229329846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:16,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:16,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717520438] [2021-07-09 17:22:16,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:16,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:16,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:16,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:16,023 INFO L87 Difference]: Start difference. First operand 454 states and 1343 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:16,110 INFO L93 Difference]: Finished difference Result 589 states and 1553 transitions. [2021-07-09 17:22:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:16,111 INFO L225 Difference]: With dead ends: 589 [2021-07-09 17:22:16,111 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:22:16,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:22:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 449. [2021-07-09 17:22:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.9575892857142856) internal successors, (1325), 448 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1325 transitions. [2021-07-09 17:22:16,119 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1325 transitions. Word has length 18 [2021-07-09 17:22:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:16,119 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1325 transitions. [2021-07-09 17:22:16,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1325 transitions. [2021-07-09 17:22:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:16,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:16,120 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:16,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,343 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1505890382, now seen corresponding path program 117 times [2021-07-09 17:22:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:16,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765320933] [2021-07-09 17:22:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765320933] [2021-07-09 17:22:16,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765320933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358850167] [2021-07-09 17:22:16,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358850167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:16,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:16,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903291498] [2021-07-09 17:22:16,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:16,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:16,447 INFO L87 Difference]: Start difference. First operand 449 states and 1325 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:16,579 INFO L93 Difference]: Finished difference Result 621 states and 1652 transitions. [2021-07-09 17:22:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:16,580 INFO L225 Difference]: With dead ends: 621 [2021-07-09 17:22:16,580 INFO L226 Difference]: Without dead ends: 614 [2021-07-09 17:22:16,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-07-09 17:22:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 459. [2021-07-09 17:22:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9519650655021836) internal successors, (1352), 458 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1352 transitions. [2021-07-09 17:22:16,586 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1352 transitions. Word has length 18 [2021-07-09 17:22:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:16,586 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1352 transitions. [2021-07-09 17:22:16,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1352 transitions. [2021-07-09 17:22:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:16,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:16,587 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:16,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-07-09 17:22:16,801 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:16,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1639250247, now seen corresponding path program 118 times [2021-07-09 17:22:16,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:16,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996191493] [2021-07-09 17:22:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:16,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996191493] [2021-07-09 17:22:16,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996191493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633794907] [2021-07-09 17:22:16,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:16,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:16,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:16,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633794907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:16,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:16,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:16,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750471938] [2021-07-09 17:22:16,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:16,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:16,881 INFO L87 Difference]: Start difference. First operand 459 states and 1352 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:16,952 INFO L93 Difference]: Finished difference Result 506 states and 1421 transitions. [2021-07-09 17:22:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:16,953 INFO L225 Difference]: With dead ends: 506 [2021-07-09 17:22:16,953 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:22:16,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:22:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 459. [2021-07-09 17:22:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.945414847161572) internal successors, (1349), 458 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1349 transitions. [2021-07-09 17:22:16,959 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1349 transitions. Word has length 18 [2021-07-09 17:22:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:16,959 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1349 transitions. [2021-07-09 17:22:16,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1349 transitions. [2021-07-09 17:22:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:16,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:16,960 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:17,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1715,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,176 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:17,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1019692920, now seen corresponding path program 119 times [2021-07-09 17:22:17,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:17,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093979996] [2021-07-09 17:22:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:17,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093979996] [2021-07-09 17:22:17,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093979996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724185448] [2021-07-09 17:22:17,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:17,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:17,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:17,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724185448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:17,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:22:17,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963569210] [2021-07-09 17:22:17,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:17,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:17,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:17,261 INFO L87 Difference]: Start difference. First operand 459 states and 1349 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:17,307 INFO L93 Difference]: Finished difference Result 603 states and 1587 transitions. [2021-07-09 17:22:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:17,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:17,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:17,308 INFO L225 Difference]: With dead ends: 603 [2021-07-09 17:22:17,308 INFO L226 Difference]: Without dead ends: 603 [2021-07-09 17:22:17,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-07-09 17:22:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 454. [2021-07-09 17:22:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.933774834437086) internal successors, (1329), 453 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1329 transitions. [2021-07-09 17:22:17,314 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1329 transitions. Word has length 18 [2021-07-09 17:22:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:17,314 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1329 transitions. [2021-07-09 17:22:17,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1329 transitions. [2021-07-09 17:22:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:17,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:17,315 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:17,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1716,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,531 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1889932499, now seen corresponding path program 120 times [2021-07-09 17:22:17,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:17,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906533399] [2021-07-09 17:22:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906533399] [2021-07-09 17:22:17,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906533399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919678662] [2021-07-09 17:22:17,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:17,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919678662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:17,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:17,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425297325] [2021-07-09 17:22:17,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:17,629 INFO L87 Difference]: Start difference. First operand 454 states and 1329 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:17,700 INFO L93 Difference]: Finished difference Result 518 states and 1445 transitions. [2021-07-09 17:22:17,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:17,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:17,701 INFO L225 Difference]: With dead ends: 518 [2021-07-09 17:22:17,701 INFO L226 Difference]: Without dead ends: 514 [2021-07-09 17:22:17,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-09 17:22:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 454. [2021-07-09 17:22:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-07-09 17:22:17,707 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-07-09 17:22:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:17,707 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-07-09 17:22:17,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-07-09 17:22:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:17,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:17,708 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:17,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1717,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,925 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1513713166, now seen corresponding path program 121 times [2021-07-09 17:22:17,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:17,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012668174] [2021-07-09 17:22:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012668174] [2021-07-09 17:22:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012668174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392086729] [2021-07-09 17:22:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:18,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392086729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:18,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:18,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101422875] [2021-07-09 17:22:18,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:18,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:18,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:18,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:18,006 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:18,060 INFO L93 Difference]: Finished difference Result 643 states and 1687 transitions. [2021-07-09 17:22:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:18,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:18,061 INFO L225 Difference]: With dead ends: 643 [2021-07-09 17:22:18,062 INFO L226 Difference]: Without dead ends: 643 [2021-07-09 17:22:18,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-09 17:22:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 454. [2021-07-09 17:22:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.9293598233995586) internal successors, (1327), 453 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1327 transitions. [2021-07-09 17:22:18,068 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1327 transitions. Word has length 18 [2021-07-09 17:22:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,068 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1327 transitions. [2021-07-09 17:22:18,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1327 transitions. [2021-07-09 17:22:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:18,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:18,069 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:18,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,285 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash 238012123, now seen corresponding path program 122 times [2021-07-09 17:22:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:18,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068439200] [2021-07-09 17:22:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:18,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068439200] [2021-07-09 17:22:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068439200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274976236] [2021-07-09 17:22:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:18,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:18,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274976236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:18,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:18,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813719328] [2021-07-09 17:22:18,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:18,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:18,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:18,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:18,363 INFO L87 Difference]: Start difference. First operand 454 states and 1327 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:18,405 INFO L93 Difference]: Finished difference Result 607 states and 1609 transitions. [2021-07-09 17:22:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:22:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:18,406 INFO L225 Difference]: With dead ends: 607 [2021-07-09 17:22:18,407 INFO L226 Difference]: Without dead ends: 605 [2021-07-09 17:22:18,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-07-09 17:22:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 455. [2021-07-09 17:22:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.909691629955947) internal successors, (1321), 454 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1321 transitions. [2021-07-09 17:22:18,412 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1321 transitions. Word has length 18 [2021-07-09 17:22:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,413 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1321 transitions. [2021-07-09 17:22:18,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1321 transitions. [2021-07-09 17:22:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:18,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:18,413 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:18,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1719,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,625 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash -539137476, now seen corresponding path program 123 times [2021-07-09 17:22:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:18,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971448397] [2021-07-09 17:22:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:18,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:18,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971448397] [2021-07-09 17:22:18,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971448397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333930342] [2021-07-09 17:22:18,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:18,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:18,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333930342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:18,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:18,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444683042] [2021-07-09 17:22:18,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:18,706 INFO L87 Difference]: Start difference. First operand 455 states and 1321 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:18,785 INFO L93 Difference]: Finished difference Result 580 states and 1522 transitions. [2021-07-09 17:22:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:18,786 INFO L225 Difference]: With dead ends: 580 [2021-07-09 17:22:18,786 INFO L226 Difference]: Without dead ends: 578 [2021-07-09 17:22:18,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-07-09 17:22:18,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 463. [2021-07-09 17:22:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-07-09 17:22:18,792 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 18 [2021-07-09 17:22:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:18,792 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-07-09 17:22:18,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-07-09 17:22:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:18,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:18,793 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1720 [2021-07-09 17:22:19,009 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1937661, now seen corresponding path program 124 times [2021-07-09 17:22:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963778003] [2021-07-09 17:22:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963778003] [2021-07-09 17:22:19,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963778003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721510627] [2021-07-09 17:22:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:19,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721510627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:19,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699657301] [2021-07-09 17:22:19,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:19,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:19,090 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:19,164 INFO L93 Difference]: Finished difference Result 556 states and 1501 transitions. [2021-07-09 17:22:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:19,165 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:22:19,165 INFO L226 Difference]: Without dead ends: 548 [2021-07-09 17:22:19,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:19,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-07-09 17:22:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 441. [2021-07-09 17:22:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.9204545454545454) internal successors, (1285), 440 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1285 transitions. [2021-07-09 17:22:19,178 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1285 transitions. Word has length 18 [2021-07-09 17:22:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:19,178 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1285 transitions. [2021-07-09 17:22:19,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1285 transitions. [2021-07-09 17:22:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:19,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,179 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-07-09 17:22:19,395 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash -889383970, now seen corresponding path program 125 times [2021-07-09 17:22:19,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075971423] [2021-07-09 17:22:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075971423] [2021-07-09 17:22:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075971423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293729515] [2021-07-09 17:22:19,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293729515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:19,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134200332] [2021-07-09 17:22:19,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:19,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:19,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:19,470 INFO L87 Difference]: Start difference. First operand 441 states and 1285 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:19,519 INFO L93 Difference]: Finished difference Result 589 states and 1530 transitions. [2021-07-09 17:22:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:19,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:19,540 INFO L225 Difference]: With dead ends: 589 [2021-07-09 17:22:19,540 INFO L226 Difference]: Without dead ends: 589 [2021-07-09 17:22:19,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:22:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-09 17:22:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 433. [2021-07-09 17:22:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.9074074074074074) internal successors, (1256), 432 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1256 transitions. [2021-07-09 17:22:19,547 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1256 transitions. Word has length 18 [2021-07-09 17:22:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:19,547 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1256 transitions. [2021-07-09 17:22:19,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1256 transitions. [2021-07-09 17:22:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:19,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,548 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:19,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-07-09 17:22:19,764 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1071147719, now seen corresponding path program 126 times [2021-07-09 17:22:19,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:19,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73184827] [2021-07-09 17:22:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73184827] [2021-07-09 17:22:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73184827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387131114] [2021-07-09 17:22:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:19,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:19,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:19,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387131114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:19,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:19,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:19,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961856247] [2021-07-09 17:22:19,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:19,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:19,860 INFO L87 Difference]: Start difference. First operand 433 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:19,944 INFO L93 Difference]: Finished difference Result 534 states and 1436 transitions. [2021-07-09 17:22:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:19,945 INFO L225 Difference]: With dead ends: 534 [2021-07-09 17:22:19,945 INFO L226 Difference]: Without dead ends: 528 [2021-07-09 17:22:19,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-09 17:22:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 435. [2021-07-09 17:22:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.8940092165898617) internal successors, (1256), 434 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1256 transitions. [2021-07-09 17:22:19,964 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1256 transitions. Word has length 18 [2021-07-09 17:22:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:19,964 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1256 transitions. [2021-07-09 17:22:19,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1256 transitions. [2021-07-09 17:22:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:19,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:19,965 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1723,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,193 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,193 INFO L82 PathProgramCache]: Analyzing trace with hash -351528392, now seen corresponding path program 127 times [2021-07-09 17:22:20,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369155009] [2021-07-09 17:22:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:20,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369155009] [2021-07-09 17:22:20,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369155009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479355626] [2021-07-09 17:22:20,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479355626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:20,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150065881] [2021-07-09 17:22:20,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:20,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:20,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:20,301 INFO L87 Difference]: Start difference. First operand 435 states and 1256 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,393 INFO L93 Difference]: Finished difference Result 650 states and 1663 transitions. [2021-07-09 17:22:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:22:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,395 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:22:20,395 INFO L226 Difference]: Without dead ends: 650 [2021-07-09 17:22:20,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-07-09 17:22:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 416. [2021-07-09 17:22:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.8891566265060242) internal successors, (1199), 415 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1199 transitions. [2021-07-09 17:22:20,402 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1199 transitions. Word has length 18 [2021-07-09 17:22:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:20,402 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1199 transitions. [2021-07-09 17:22:20,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1199 transitions. [2021-07-09 17:22:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:20,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:20,403 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1724,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,605 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1243555061, now seen corresponding path program 128 times [2021-07-09 17:22:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425432775] [2021-07-09 17:22:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:20,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:20,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425432775] [2021-07-09 17:22:20,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425432775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718828688] [2021-07-09 17:22:20,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718828688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:20,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:20,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803629286] [2021-07-09 17:22:20,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:20,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:20,689 INFO L87 Difference]: Start difference. First operand 416 states and 1199 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:20,727 INFO L93 Difference]: Finished difference Result 564 states and 1469 transitions. [2021-07-09 17:22:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:22:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:20,728 INFO L225 Difference]: With dead ends: 564 [2021-07-09 17:22:20,728 INFO L226 Difference]: Without dead ends: 562 [2021-07-09 17:22:20,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-09 17:22:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 408. [2021-07-09 17:22:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.8746928746928746) internal successors, (1170), 407 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1170 transitions. [2021-07-09 17:22:20,733 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1170 transitions. Word has length 18 [2021-07-09 17:22:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:20,733 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1170 transitions. [2021-07-09 17:22:20,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1170 transitions. [2021-07-09 17:22:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:20,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:20,734 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:20,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1725 [2021-07-09 17:22:20,938 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:20,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2020704660, now seen corresponding path program 129 times [2021-07-09 17:22:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:20,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515277695] [2021-07-09 17:22:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:20,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:20,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515277695] [2021-07-09 17:22:20,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515277695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:20,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098738348] [2021-07-09 17:22:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:20,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:21,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098738348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:21,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:21,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235043995] [2021-07-09 17:22:21,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:21,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:21,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:21,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:21,027 INFO L87 Difference]: Start difference. First operand 408 states and 1170 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:21,104 INFO L93 Difference]: Finished difference Result 517 states and 1347 transitions. [2021-07-09 17:22:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:21,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:21,105 INFO L225 Difference]: With dead ends: 517 [2021-07-09 17:22:21,105 INFO L226 Difference]: Without dead ends: 515 [2021-07-09 17:22:21,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-09 17:22:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 394. [2021-07-09 17:22:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8575063613231553) internal successors, (1123), 393 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1123 transitions. [2021-07-09 17:22:21,110 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1123 transitions. Word has length 18 [2021-07-09 17:22:21,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:21,110 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1123 transitions. [2021-07-09 17:22:21,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1123 transitions. [2021-07-09 17:22:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:21,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:21,111 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:21,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1726,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:21,311 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1742252393, now seen corresponding path program 130 times [2021-07-09 17:22:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:21,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383716399] [2021-07-09 17:22:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383716399] [2021-07-09 17:22:21,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383716399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112865060] [2021-07-09 17:22:21,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:21,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:21,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:21,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112865060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:21,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954926261] [2021-07-09 17:22:21,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:21,400 INFO L87 Difference]: Start difference. First operand 394 states and 1123 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:21,494 INFO L93 Difference]: Finished difference Result 504 states and 1317 transitions. [2021-07-09 17:22:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:21,495 INFO L225 Difference]: With dead ends: 504 [2021-07-09 17:22:21,495 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 17:22:21,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 17:22:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 382. [2021-07-09 17:22:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.8451443569553807) internal successors, (1084), 381 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1084 transitions. [2021-07-09 17:22:21,500 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1084 transitions. Word has length 18 [2021-07-09 17:22:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:21,500 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1084 transitions. [2021-07-09 17:22:21,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1084 transitions. [2021-07-09 17:22:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:21,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:21,510 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:21,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:21,726 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:21,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:21,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1833095576, now seen corresponding path program 131 times [2021-07-09 17:22:21,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:21,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33822885] [2021-07-09 17:22:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:21,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33822885] [2021-07-09 17:22:21,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33822885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558499525] [2021-07-09 17:22:21,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:21,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:21,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:21,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558499525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:21,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:21,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:21,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451419231] [2021-07-09 17:22:21,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:21,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:21,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:21,834 INFO L87 Difference]: Start difference. First operand 382 states and 1084 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:21,913 INFO L93 Difference]: Finished difference Result 511 states and 1300 transitions. [2021-07-09 17:22:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:21,914 INFO L225 Difference]: With dead ends: 511 [2021-07-09 17:22:21,914 INFO L226 Difference]: Without dead ends: 511 [2021-07-09 17:22:21,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-09 17:22:21,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 377. [2021-07-09 17:22:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8324468085106385) internal successors, (1065), 376 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1065 transitions. [2021-07-09 17:22:21,937 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1065 transitions. Word has length 18 [2021-07-09 17:22:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:21,937 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1065 transitions. [2021-07-09 17:22:21,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1065 transitions. [2021-07-09 17:22:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:21,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:21,938 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:22,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,157 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1458623315, now seen corresponding path program 132 times [2021-07-09 17:22:22,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:22,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028570376] [2021-07-09 17:22:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:22,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028570376] [2021-07-09 17:22:22,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028570376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63793332] [2021-07-09 17:22:22,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:22,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:22,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63793332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:22,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:22,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732414299] [2021-07-09 17:22:22,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:22,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:22,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:22,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:22,246 INFO L87 Difference]: Start difference. First operand 377 states and 1065 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:22,321 INFO L93 Difference]: Finished difference Result 521 states and 1359 transitions. [2021-07-09 17:22:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:22,322 INFO L225 Difference]: With dead ends: 521 [2021-07-09 17:22:22,322 INFO L226 Difference]: Without dead ends: 513 [2021-07-09 17:22:22,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-09 17:22:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 377. [2021-07-09 17:22:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.8297872340425534) internal successors, (1064), 376 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1064 transitions. [2021-07-09 17:22:22,327 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1064 transitions. Word has length 18 [2021-07-09 17:22:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:22,327 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1064 transitions. [2021-07-09 17:22:22,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1064 transitions. [2021-07-09 17:22:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:22,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:22,327 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:22,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,541 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1955525454, now seen corresponding path program 133 times [2021-07-09 17:22:22,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:22,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827487394] [2021-07-09 17:22:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:22,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827487394] [2021-07-09 17:22:22,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827487394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899279323] [2021-07-09 17:22:22,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:22,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899279323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:22,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:22,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006514123] [2021-07-09 17:22:22,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:22,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:22,626 INFO L87 Difference]: Start difference. First operand 377 states and 1064 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:22,738 INFO L93 Difference]: Finished difference Result 650 states and 1689 transitions. [2021-07-09 17:22:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:22,739 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:22:22,739 INFO L226 Difference]: Without dead ends: 650 [2021-07-09 17:22:22,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-07-09 17:22:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 394. [2021-07-09 17:22:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.8066157760814248) internal successors, (1103), 393 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1103 transitions. [2021-07-09 17:22:22,744 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1103 transitions. Word has length 18 [2021-07-09 17:22:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:22,744 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1103 transitions. [2021-07-09 17:22:22,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1103 transitions. [2021-07-09 17:22:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:22,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:22,745 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:22,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-07-09 17:22:22,961 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash 175561913, now seen corresponding path program 134 times [2021-07-09 17:22:22,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:22,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741923957] [2021-07-09 17:22:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:22,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741923957] [2021-07-09 17:22:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741923957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536638627] [2021-07-09 17:22:22,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:23,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:23,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:23,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:23,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536638627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:23,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:23,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695755950] [2021-07-09 17:22:23,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:23,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:23,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:23,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:23,044 INFO L87 Difference]: Start difference. First operand 394 states and 1103 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:23,100 INFO L93 Difference]: Finished difference Result 503 states and 1306 transitions. [2021-07-09 17:22:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:23,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:23,101 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:22:23,101 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:22:23,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:22:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 398. [2021-07-09 17:22:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.808564231738035) internal successors, (1115), 397 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1115 transitions. [2021-07-09 17:22:23,106 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1115 transitions. Word has length 18 [2021-07-09 17:22:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:23,106 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1115 transitions. [2021-07-09 17:22:23,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1115 transitions. [2021-07-09 17:22:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:23,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:23,106 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:23,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-07-09 17:22:23,322 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1853728120, now seen corresponding path program 135 times [2021-07-09 17:22:23,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:23,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168967042] [2021-07-09 17:22:23,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:23,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168967042] [2021-07-09 17:22:23,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168967042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874532997] [2021-07-09 17:22:23,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:23,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:23,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874532997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:23,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102132262] [2021-07-09 17:22:23,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:23,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:23,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:23,399 INFO L87 Difference]: Start difference. First operand 398 states and 1115 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:23,493 INFO L93 Difference]: Finished difference Result 494 states and 1259 transitions. [2021-07-09 17:22:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:23,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:23,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:23,494 INFO L225 Difference]: With dead ends: 494 [2021-07-09 17:22:23,494 INFO L226 Difference]: Without dead ends: 490 [2021-07-09 17:22:23,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-09 17:22:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 398. [2021-07-09 17:22:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.8060453400503778) internal successors, (1114), 397 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1114 transitions. [2021-07-09 17:22:23,501 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1114 transitions. Word has length 18 [2021-07-09 17:22:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:23,501 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1114 transitions. [2021-07-09 17:22:23,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1114 transitions. [2021-07-09 17:22:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:23,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:23,502 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:23,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1732 [2021-07-09 17:22:23,718 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1124891415, now seen corresponding path program 136 times [2021-07-09 17:22:23,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:23,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40828881] [2021-07-09 17:22:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:23,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:23,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40828881] [2021-07-09 17:22:23,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40828881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518389686] [2021-07-09 17:22:23,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:23,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:23,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:23,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:23,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518389686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:23,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:23,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:23,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368278973] [2021-07-09 17:22:23,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:23,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:23,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:23,804 INFO L87 Difference]: Start difference. First operand 398 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:23,884 INFO L93 Difference]: Finished difference Result 544 states and 1417 transitions. [2021-07-09 17:22:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:23,885 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:22:23,885 INFO L226 Difference]: Without dead ends: 536 [2021-07-09 17:22:23,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-09 17:22:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 398. [2021-07-09 17:22:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.7984886649874054) internal successors, (1111), 397 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1111 transitions. [2021-07-09 17:22:23,890 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1111 transitions. Word has length 18 [2021-07-09 17:22:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1111 transitions. [2021-07-09 17:22:23,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1111 transitions. [2021-07-09 17:22:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:23,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:23,891 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:24,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1733,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,107 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:24,108 INFO L82 PathProgramCache]: Analyzing trace with hash 244072888, now seen corresponding path program 137 times [2021-07-09 17:22:24,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:24,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863754638] [2021-07-09 17:22:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:24,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863754638] [2021-07-09 17:22:24,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863754638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826669616] [2021-07-09 17:22:24,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:24,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826669616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:24,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:24,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159767111] [2021-07-09 17:22:24,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:24,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:24,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:24,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:24,194 INFO L87 Difference]: Start difference. First operand 398 states and 1111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:24,300 INFO L93 Difference]: Finished difference Result 600 states and 1559 transitions. [2021-07-09 17:22:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:24,301 INFO L225 Difference]: With dead ends: 600 [2021-07-09 17:22:24,301 INFO L226 Difference]: Without dead ends: 600 [2021-07-09 17:22:24,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-09 17:22:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 351. [2021-07-09 17:22:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7857142857142856) internal successors, (975), 350 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 975 transitions. [2021-07-09 17:22:24,306 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 975 transitions. Word has length 18 [2021-07-09 17:22:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:24,306 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 975 transitions. [2021-07-09 17:22:24,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 975 transitions. [2021-07-09 17:22:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:24,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:24,306 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:24,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1734 [2021-07-09 17:22:24,522 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash 72502491, now seen corresponding path program 138 times [2021-07-09 17:22:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:24,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153264785] [2021-07-09 17:22:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:24,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153264785] [2021-07-09 17:22:24,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153264785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906585938] [2021-07-09 17:22:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:24,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:24,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:24,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:24,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906585938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:24,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:24,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334846752] [2021-07-09 17:22:24,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:24,601 INFO L87 Difference]: Start difference. First operand 351 states and 975 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:24,641 INFO L93 Difference]: Finished difference Result 535 states and 1322 transitions. [2021-07-09 17:22:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:22:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:24,642 INFO L225 Difference]: With dead ends: 535 [2021-07-09 17:22:24,642 INFO L226 Difference]: Without dead ends: 535 [2021-07-09 17:22:24,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-09 17:22:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 363. [2021-07-09 17:22:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.820441988950276) internal successors, (1021), 362 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1021 transitions. [2021-07-09 17:22:24,647 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1021 transitions. Word has length 18 [2021-07-09 17:22:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:24,647 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 1021 transitions. [2021-07-09 17:22:24,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1021 transitions. [2021-07-09 17:22:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:24,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:24,648 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:24,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1735 [2021-07-09 17:22:24,864 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:24,864 INFO L82 PathProgramCache]: Analyzing trace with hash -704647108, now seen corresponding path program 139 times [2021-07-09 17:22:24,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:24,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841009914] [2021-07-09 17:22:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:24,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:24,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841009914] [2021-07-09 17:22:24,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841009914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098202974] [2021-07-09 17:22:24,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:24,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098202974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:24,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:24,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:22:24,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410382547] [2021-07-09 17:22:24,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:22:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:24,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:22:24,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:22:24,936 INFO L87 Difference]: Start difference. First operand 363 states and 1021 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:25,006 INFO L93 Difference]: Finished difference Result 446 states and 1156 transitions. [2021-07-09 17:22:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:22:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:25,007 INFO L225 Difference]: With dead ends: 446 [2021-07-09 17:22:25,007 INFO L226 Difference]: Without dead ends: 444 [2021-07-09 17:22:25,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-09 17:22:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 371. [2021-07-09 17:22:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.82972972972973) internal successors, (1047), 370 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1047 transitions. [2021-07-09 17:22:25,011 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1047 transitions. Word has length 18 [2021-07-09 17:22:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:25,011 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1047 transitions. [2021-07-09 17:22:25,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1047 transitions. [2021-07-09 17:22:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:25,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:25,012 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:25,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1736,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,221 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash -163571971, now seen corresponding path program 140 times [2021-07-09 17:22:25,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:25,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193135571] [2021-07-09 17:22:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:25,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193135571] [2021-07-09 17:22:25,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193135571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835498615] [2021-07-09 17:22:25,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:25,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835498615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:25,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263495540] [2021-07-09 17:22:25,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:25,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:25,303 INFO L87 Difference]: Start difference. First operand 371 states and 1047 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:25,391 INFO L93 Difference]: Finished difference Result 529 states and 1322 transitions. [2021-07-09 17:22:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:25,392 INFO L225 Difference]: With dead ends: 529 [2021-07-09 17:22:25,392 INFO L226 Difference]: Without dead ends: 523 [2021-07-09 17:22:25,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:25,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-07-09 17:22:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 371. [2021-07-09 17:22:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.8189189189189188) internal successors, (1043), 370 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1043 transitions. [2021-07-09 17:22:25,396 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1043 transitions. Word has length 18 [2021-07-09 17:22:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:25,396 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1043 transitions. [2021-07-09 17:22:25,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1043 transitions. [2021-07-09 17:22:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:25,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:25,397 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:25,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1737 [2021-07-09 17:22:25,613 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1054893602, now seen corresponding path program 141 times [2021-07-09 17:22:25,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:25,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640968115] [2021-07-09 17:22:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640968115] [2021-07-09 17:22:25,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640968115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68197382] [2021-07-09 17:22:25,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:25,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:25,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:25,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68197382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:25,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:25,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:25,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8626111] [2021-07-09 17:22:25,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:25,693 INFO L87 Difference]: Start difference. First operand 371 states and 1043 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:25,749 INFO L93 Difference]: Finished difference Result 464 states and 1205 transitions. [2021-07-09 17:22:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:25,750 INFO L225 Difference]: With dead ends: 464 [2021-07-09 17:22:25,750 INFO L226 Difference]: Without dead ends: 464 [2021-07-09 17:22:25,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-09 17:22:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2021-07-09 17:22:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.7954545454545454) internal successors, (984), 352 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 984 transitions. [2021-07-09 17:22:25,754 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 984 transitions. Word has length 18 [2021-07-09 17:22:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:25,754 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 984 transitions. [2021-07-09 17:22:25,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 984 transitions. [2021-07-09 17:22:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:25,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:25,755 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:25,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:25,971 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:25,971 INFO L82 PathProgramCache]: Analyzing trace with hash -142565763, now seen corresponding path program 142 times [2021-07-09 17:22:25,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:25,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786756776] [2021-07-09 17:22:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:26,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786756776] [2021-07-09 17:22:26,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786756776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309964732] [2021-07-09 17:22:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:26,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309964732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:26,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:26,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899742610] [2021-07-09 17:22:26,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:26,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:26,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:26,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:26,071 INFO L87 Difference]: Start difference. First operand 353 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:26,180 INFO L93 Difference]: Finished difference Result 494 states and 1235 transitions. [2021-07-09 17:22:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:26,181 INFO L225 Difference]: With dead ends: 494 [2021-07-09 17:22:26,181 INFO L226 Difference]: Without dead ends: 486 [2021-07-09 17:22:26,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-09 17:22:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 359. [2021-07-09 17:22:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.776536312849162) internal successors, (994), 358 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 994 transitions. [2021-07-09 17:22:26,185 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 994 transitions. Word has length 18 [2021-07-09 17:22:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:26,185 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 994 transitions. [2021-07-09 17:22:26,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 994 transitions. [2021-07-09 17:22:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:26,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:26,186 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:26,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,402 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1023384290, now seen corresponding path program 143 times [2021-07-09 17:22:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:26,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104888312] [2021-07-09 17:22:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104888312] [2021-07-09 17:22:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104888312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333802418] [2021-07-09 17:22:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:22:26,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333802418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:26,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731971415] [2021-07-09 17:22:26,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:26,535 INFO L87 Difference]: Start difference. First operand 359 states and 994 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:26,621 INFO L93 Difference]: Finished difference Result 473 states and 1180 transitions. [2021-07-09 17:22:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:26,622 INFO L225 Difference]: With dead ends: 473 [2021-07-09 17:22:26,622 INFO L226 Difference]: Without dead ends: 473 [2021-07-09 17:22:26,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-09 17:22:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 306. [2021-07-09 17:22:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.7147540983606557) internal successors, (828), 305 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 828 transitions. [2021-07-09 17:22:26,626 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 828 transitions. Word has length 18 [2021-07-09 17:22:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:26,626 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 828 transitions. [2021-07-09 17:22:26,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 828 transitions. [2021-07-09 17:22:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:26,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:26,627 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:26,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1740,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,843 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash -585464903, now seen corresponding path program 144 times [2021-07-09 17:22:26,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:26,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592779190] [2021-07-09 17:22:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592779190] [2021-07-09 17:22:26,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592779190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77298933] [2021-07-09 17:22:26,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:26,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:26,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:26,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:26,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77298933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:26,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:26,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:26,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910696769] [2021-07-09 17:22:26,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:26,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:26,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:26,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:26,935 INFO L87 Difference]: Start difference. First operand 306 states and 828 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:27,012 INFO L93 Difference]: Finished difference Result 550 states and 1344 transitions. [2021-07-09 17:22:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:27,013 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:22:27,013 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:22:27,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:22:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 317. [2021-07-09 17:22:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6835443037974684) internal successors, (848), 316 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 848 transitions. [2021-07-09 17:22:27,017 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 848 transitions. Word has length 18 [2021-07-09 17:22:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:27,017 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 848 transitions. [2021-07-09 17:22:27,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 848 transitions. [2021-07-09 17:22:27,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:27,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:27,017 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:27,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-07-09 17:22:27,234 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 459750648, now seen corresponding path program 145 times [2021-07-09 17:22:27,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:27,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670012848] [2021-07-09 17:22:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:27,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:27,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670012848] [2021-07-09 17:22:27,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670012848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:27,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730801346] [2021-07-09 17:22:27,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:27,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730801346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:27,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:27,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:27,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323291766] [2021-07-09 17:22:27,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:27,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:27,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:27,328 INFO L87 Difference]: Start difference. First operand 317 states and 848 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:27,470 INFO L93 Difference]: Finished difference Result 534 states and 1298 transitions. [2021-07-09 17:22:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:27,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:27,471 INFO L225 Difference]: With dead ends: 534 [2021-07-09 17:22:27,471 INFO L226 Difference]: Without dead ends: 534 [2021-07-09 17:22:27,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-09 17:22:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 351. [2021-07-09 17:22:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.7085714285714286) internal successors, (948), 350 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 948 transitions. [2021-07-09 17:22:27,476 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 948 transitions. Word has length 18 [2021-07-09 17:22:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:27,476 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 948 transitions. [2021-07-09 17:22:27,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 948 transitions. [2021-07-09 17:22:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:27,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:27,477 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:27,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1742 [2021-07-09 17:22:27,694 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:27,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1339860081, now seen corresponding path program 146 times [2021-07-09 17:22:27,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:27,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023897722] [2021-07-09 17:22:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:27,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023897722] [2021-07-09 17:22:27,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023897722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140961569] [2021-07-09 17:22:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:27,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:27,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140961569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:27,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:27,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:27,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144999872] [2021-07-09 17:22:27,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:27,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:27,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:27,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:27,786 INFO L87 Difference]: Start difference. First operand 351 states and 948 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:27,845 INFO L93 Difference]: Finished difference Result 539 states and 1303 transitions. [2021-07-09 17:22:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:27,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:27,846 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:22:27,846 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 17:22:27,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 17:22:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 380. [2021-07-09 17:22:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.7651715039577835) internal successors, (1048), 379 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1048 transitions. [2021-07-09 17:22:27,851 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1048 transitions. Word has length 18 [2021-07-09 17:22:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:27,851 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1048 transitions. [2021-07-09 17:22:27,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1048 transitions. [2021-07-09 17:22:27,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:27,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:27,852 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:28,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1743 [2021-07-09 17:22:28,065 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash 338306126, now seen corresponding path program 147 times [2021-07-09 17:22:28,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:28,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229853253] [2021-07-09 17:22:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:28,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229853253] [2021-07-09 17:22:28,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229853253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975966773] [2021-07-09 17:22:28,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:28,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:28,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975966773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:28,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:22:28,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269815596] [2021-07-09 17:22:28,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:28,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:28,150 INFO L87 Difference]: Start difference. First operand 380 states and 1048 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:28,266 INFO L93 Difference]: Finished difference Result 531 states and 1311 transitions. [2021-07-09 17:22:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:22:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:28,267 INFO L225 Difference]: With dead ends: 531 [2021-07-09 17:22:28,267 INFO L226 Difference]: Without dead ends: 527 [2021-07-09 17:22:28,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-09 17:22:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 393. [2021-07-09 17:22:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.7933673469387754) internal successors, (1095), 392 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1095 transitions. [2021-07-09 17:22:28,273 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1095 transitions. Word has length 18 [2021-07-09 17:22:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:28,273 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1095 transitions. [2021-07-09 17:22:28,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1095 transitions. [2021-07-09 17:22:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:28,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:28,273 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:28,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1744 [2021-07-09 17:22:28,489 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash 879381263, now seen corresponding path program 148 times [2021-07-09 17:22:28,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:28,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424841861] [2021-07-09 17:22:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:28,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424841861] [2021-07-09 17:22:28,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424841861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620708877] [2021-07-09 17:22:28,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:28,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:28,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620708877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:28,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:28,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249649811] [2021-07-09 17:22:28,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:28,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:28,565 INFO L87 Difference]: Start difference. First operand 393 states and 1095 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:28,639 INFO L93 Difference]: Finished difference Result 519 states and 1293 transitions. [2021-07-09 17:22:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:28,640 INFO L225 Difference]: With dead ends: 519 [2021-07-09 17:22:28,640 INFO L226 Difference]: Without dead ends: 517 [2021-07-09 17:22:28,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-09 17:22:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 391. [2021-07-09 17:22:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.7974358974358973) internal successors, (1091), 390 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1091 transitions. [2021-07-09 17:22:28,645 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1091 transitions. Word has length 18 [2021-07-09 17:22:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:28,645 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1091 transitions. [2021-07-09 17:22:28,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1091 transitions. [2021-07-09 17:22:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:28,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:28,646 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:28,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1745,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,863 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -756642866, now seen corresponding path program 149 times [2021-07-09 17:22:28,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:28,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441246672] [2021-07-09 17:22:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:28,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441246672] [2021-07-09 17:22:28,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441246672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828240789] [2021-07-09 17:22:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:28,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:28,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:28,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828240789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:28,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:28,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:28,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580080270] [2021-07-09 17:22:28,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:28,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:28,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:28,954 INFO L87 Difference]: Start difference. First operand 391 states and 1091 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:29,012 INFO L93 Difference]: Finished difference Result 530 states and 1322 transitions. [2021-07-09 17:22:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:29,013 INFO L225 Difference]: With dead ends: 530 [2021-07-09 17:22:29,013 INFO L226 Difference]: Without dead ends: 530 [2021-07-09 17:22:29,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-07-09 17:22:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-07-09 17:22:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.78772378516624) internal successors, (1090), 391 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1090 transitions. [2021-07-09 17:22:29,018 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1090 transitions. Word has length 18 [2021-07-09 17:22:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:29,018 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1090 transitions. [2021-07-09 17:22:29,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1090 transitions. [2021-07-09 17:22:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:29,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:29,019 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:29,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:29,233 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2100886897, now seen corresponding path program 150 times [2021-07-09 17:22:29,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:29,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711791386] [2021-07-09 17:22:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:29,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711791386] [2021-07-09 17:22:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711791386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:29,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880562593] [2021-07-09 17:22:29,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:29,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:29,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:29,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880562593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:29,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:29,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:29,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293740566] [2021-07-09 17:22:29,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:29,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:29,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:29,329 INFO L87 Difference]: Start difference. First operand 392 states and 1090 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:29,415 INFO L93 Difference]: Finished difference Result 597 states and 1517 transitions. [2021-07-09 17:22:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:22:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:29,416 INFO L225 Difference]: With dead ends: 597 [2021-07-09 17:22:29,416 INFO L226 Difference]: Without dead ends: 587 [2021-07-09 17:22:29,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:22:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-09 17:22:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 392. [2021-07-09 17:22:29,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.785166240409207) internal successors, (1089), 391 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1089 transitions. [2021-07-09 17:22:29,421 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1089 transitions. Word has length 18 [2021-07-09 17:22:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:29,421 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1089 transitions. [2021-07-09 17:22:29,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1089 transitions. [2021-07-09 17:22:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:29,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:29,422 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:29,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1747 [2021-07-09 17:22:29,638 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1055671346, now seen corresponding path program 151 times [2021-07-09 17:22:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:29,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424313131] [2021-07-09 17:22:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:29,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:29,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424313131] [2021-07-09 17:22:29,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424313131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:29,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942548601] [2021-07-09 17:22:29,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942548601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:29,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:29,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107719647] [2021-07-09 17:22:29,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:29,734 INFO L87 Difference]: Start difference. First operand 392 states and 1089 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:29,873 INFO L93 Difference]: Finished difference Result 529 states and 1361 transitions. [2021-07-09 17:22:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:29,874 INFO L225 Difference]: With dead ends: 529 [2021-07-09 17:22:29,874 INFO L226 Difference]: Without dead ends: 529 [2021-07-09 17:22:29,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-09 17:22:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 385. [2021-07-09 17:22:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.78125) internal successors, (1068), 384 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1068 transitions. [2021-07-09 17:22:29,879 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1068 transitions. Word has length 18 [2021-07-09 17:22:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:29,879 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1068 transitions. [2021-07-09 17:22:29,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1068 transitions. [2021-07-09 17:22:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:29,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:29,880 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,080 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2079386357, now seen corresponding path program 152 times [2021-07-09 17:22:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730277527] [2021-07-09 17:22:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:30,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730277527] [2021-07-09 17:22:30,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730277527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781969809] [2021-07-09 17:22:30,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781969809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:30,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477383653] [2021-07-09 17:22:30,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:30,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:30,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:30,224 INFO L87 Difference]: Start difference. First operand 385 states and 1068 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:30,268 INFO L93 Difference]: Finished difference Result 612 states and 1535 transitions. [2021-07-09 17:22:30,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:22:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:30,269 INFO L225 Difference]: With dead ends: 612 [2021-07-09 17:22:30,269 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 17:22:30,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 17:22:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 441. [2021-07-09 17:22:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8545454545454545) internal successors, (1256), 440 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1256 transitions. [2021-07-09 17:22:30,275 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1256 transitions. Word has length 18 [2021-07-09 17:22:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:30,275 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1256 transitions. [2021-07-09 17:22:30,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1256 transitions. [2021-07-09 17:22:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:30,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:30,276 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:30,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,485 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1438431340, now seen corresponding path program 153 times [2021-07-09 17:22:30,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:30,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673978374] [2021-07-09 17:22:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:30,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673978374] [2021-07-09 17:22:30,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673978374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841576682] [2021-07-09 17:22:30,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:22:30,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:30,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:30,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841576682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101641644] [2021-07-09 17:22:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:30,570 INFO L87 Difference]: Start difference. First operand 441 states and 1256 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:30,673 INFO L93 Difference]: Finished difference Result 564 states and 1468 transitions. [2021-07-09 17:22:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:30,674 INFO L225 Difference]: With dead ends: 564 [2021-07-09 17:22:30,674 INFO L226 Difference]: Without dead ends: 562 [2021-07-09 17:22:30,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-09 17:22:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 455. [2021-07-09 17:22:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8788546255506606) internal successors, (1307), 454 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1307 transitions. [2021-07-09 17:22:30,680 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1307 transitions. Word has length 18 [2021-07-09 17:22:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:30,680 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1307 transitions. [2021-07-09 17:22:30,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1307 transitions. [2021-07-09 17:22:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:30,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:30,680 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:30,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-07-09 17:22:30,881 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 490101481, now seen corresponding path program 154 times [2021-07-09 17:22:30,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:30,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113357344] [2021-07-09 17:22:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113357344] [2021-07-09 17:22:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113357344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120590139] [2021-07-09 17:22:30,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:30,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:30,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:30,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120590139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:30,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:30,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775831053] [2021-07-09 17:22:30,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:30,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:30,967 INFO L87 Difference]: Start difference. First operand 455 states and 1307 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:31,050 INFO L93 Difference]: Finished difference Result 609 states and 1555 transitions. [2021-07-09 17:22:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:31,051 INFO L225 Difference]: With dead ends: 609 [2021-07-09 17:22:31,051 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:22:31,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:22:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 455. [2021-07-09 17:22:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.8766519823788546) internal successors, (1306), 454 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1306 transitions. [2021-07-09 17:22:31,057 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1306 transitions. Word has length 18 [2021-07-09 17:22:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:31,057 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1306 transitions. [2021-07-09 17:22:31,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1306 transitions. [2021-07-09 17:22:31,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:31,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:31,058 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:31,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1751 [2021-07-09 17:22:31,273 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1145922648, now seen corresponding path program 155 times [2021-07-09 17:22:31,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:31,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244695382] [2021-07-09 17:22:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:31,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:31,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244695382] [2021-07-09 17:22:31,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244695382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824937317] [2021-07-09 17:22:31,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:31,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:31,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:31,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:31,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824937317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:31,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427762160] [2021-07-09 17:22:31,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:31,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:31,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:31,353 INFO L87 Difference]: Start difference. First operand 455 states and 1306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:31,410 INFO L93 Difference]: Finished difference Result 584 states and 1520 transitions. [2021-07-09 17:22:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:31,411 INFO L225 Difference]: With dead ends: 584 [2021-07-09 17:22:31,411 INFO L226 Difference]: Without dead ends: 584 [2021-07-09 17:22:31,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:22:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-09 17:22:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 459. [2021-07-09 17:22:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8777292576419216) internal successors, (1318), 458 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1318 transitions. [2021-07-09 17:22:31,417 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1318 transitions. Word has length 18 [2021-07-09 17:22:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:31,417 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1318 transitions. [2021-07-09 17:22:31,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1318 transitions. [2021-07-09 17:22:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:31,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:31,417 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:31,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1752,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:31,633 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1979506477, now seen corresponding path program 156 times [2021-07-09 17:22:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:31,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782127990] [2021-07-09 17:22:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:31,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:31,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782127990] [2021-07-09 17:22:31,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782127990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088466200] [2021-07-09 17:22:31,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:31,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:31,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:31,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088466200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:31,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:31,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957112076] [2021-07-09 17:22:31,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:31,707 INFO L87 Difference]: Start difference. First operand 459 states and 1318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:31,784 INFO L93 Difference]: Finished difference Result 652 states and 1678 transitions. [2021-07-09 17:22:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:31,785 INFO L225 Difference]: With dead ends: 652 [2021-07-09 17:22:31,786 INFO L226 Difference]: Without dead ends: 648 [2021-07-09 17:22:31,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-07-09 17:22:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 459. [2021-07-09 17:22:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.8755458515283845) internal successors, (1317), 458 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1317 transitions. [2021-07-09 17:22:31,791 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1317 transitions. Word has length 18 [2021-07-09 17:22:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:31,792 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1317 transitions. [2021-07-09 17:22:31,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1317 transitions. [2021-07-09 17:22:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:31,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:31,792 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:32,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1753 [2021-07-09 17:22:32,005 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1088184846, now seen corresponding path program 157 times [2021-07-09 17:22:32,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:32,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745962131] [2021-07-09 17:22:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:32,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745962131] [2021-07-09 17:22:32,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745962131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229089965] [2021-07-09 17:22:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:32,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:32,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229089965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:32,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:22:32,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728578463] [2021-07-09 17:22:32,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:22:32,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:32,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:22:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:22:32,089 INFO L87 Difference]: Start difference. First operand 459 states and 1317 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:32,154 INFO L93 Difference]: Finished difference Result 559 states and 1507 transitions. [2021-07-09 17:22:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:32,155 INFO L225 Difference]: With dead ends: 559 [2021-07-09 17:22:32,155 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:22:32,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:22:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:22:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-07-09 17:22:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.882978723404255) internal successors, (1355), 470 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1355 transitions. [2021-07-09 17:22:32,161 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1355 transitions. Word has length 18 [2021-07-09 17:22:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:32,161 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1355 transitions. [2021-07-09 17:22:32,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1355 transitions. [2021-07-09 17:22:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:32,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:32,162 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:32,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1754,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:32,379 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash 906421097, now seen corresponding path program 158 times [2021-07-09 17:22:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:32,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242333591] [2021-07-09 17:22:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242333591] [2021-07-09 17:22:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242333591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206543318] [2021-07-09 17:22:32,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:32,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:32,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206543318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:32,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:32,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524327840] [2021-07-09 17:22:32,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:32,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:32,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:32,477 INFO L87 Difference]: Start difference. First operand 471 states and 1355 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:32,586 INFO L93 Difference]: Finished difference Result 682 states and 1750 transitions. [2021-07-09 17:22:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:32,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:32,588 INFO L225 Difference]: With dead ends: 682 [2021-07-09 17:22:32,588 INFO L226 Difference]: Without dead ends: 676 [2021-07-09 17:22:32,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:22:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-09 17:22:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 482. [2021-07-09 17:22:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.9022869022869022) internal successors, (1396), 481 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1396 transitions. [2021-07-09 17:22:32,594 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1396 transitions. Word has length 18 [2021-07-09 17:22:32,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:32,594 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1396 transitions. [2021-07-09 17:22:32,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1396 transitions. [2021-07-09 17:22:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:32,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:32,594 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:32,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1755,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:32,795 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1626040424, now seen corresponding path program 159 times [2021-07-09 17:22:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:32,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186071189] [2021-07-09 17:22:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:32,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186071189] [2021-07-09 17:22:32,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186071189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542003106] [2021-07-09 17:22:32,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:32,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:32,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542003106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:32,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:32,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:32,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163375570] [2021-07-09 17:22:32,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:32,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:32,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:32,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:32,886 INFO L87 Difference]: Start difference. First operand 482 states and 1396 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:32,956 INFO L93 Difference]: Finished difference Result 581 states and 1569 transitions. [2021-07-09 17:22:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:22:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:32,957 INFO L225 Difference]: With dead ends: 581 [2021-07-09 17:22:32,957 INFO L226 Difference]: Without dead ends: 579 [2021-07-09 17:22:32,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:22:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-09 17:22:32,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 483. [2021-07-09 17:22:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.9024896265560165) internal successors, (1399), 482 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1399 transitions. [2021-07-09 17:22:32,963 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1399 transitions. Word has length 18 [2021-07-09 17:22:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:32,963 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1399 transitions. [2021-07-09 17:22:32,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1399 transitions. [2021-07-09 17:22:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:32,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:32,964 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:33,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1756 [2021-07-09 17:22:33,181 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1119694158, now seen corresponding path program 160 times [2021-07-09 17:22:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:33,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698613619] [2021-07-09 17:22:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:33,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:33,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698613619] [2021-07-09 17:22:33,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698613619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828329885] [2021-07-09 17:22:33,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:33,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:33,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828329885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:33,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:22:33,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911599997] [2021-07-09 17:22:33,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:22:33,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:33,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:22:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:22:33,266 INFO L87 Difference]: Start difference. First operand 483 states and 1399 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:33,318 INFO L93 Difference]: Finished difference Result 540 states and 1521 transitions. [2021-07-09 17:22:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:22:33,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:33,319 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:22:33,319 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:22:33,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:22:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 503. [2021-07-09 17:22:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.902390438247012) internal successors, (1457), 502 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1457 transitions. [2021-07-09 17:22:33,324 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1457 transitions. Word has length 18 [2021-07-09 17:22:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:33,324 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1457 transitions. [2021-07-09 17:22:33,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1457 transitions. [2021-07-09 17:22:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:33,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:33,325 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:33,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:33,541 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1557613545, now seen corresponding path program 161 times [2021-07-09 17:22:33,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:33,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284627706] [2021-07-09 17:22:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:33,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284627706] [2021-07-09 17:22:33,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284627706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033413613] [2021-07-09 17:22:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:33,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033413613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679007449] [2021-07-09 17:22:33,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:33,628 INFO L87 Difference]: Start difference. First operand 503 states and 1457 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:33,722 INFO L93 Difference]: Finished difference Result 774 states and 2053 transitions. [2021-07-09 17:22:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:22:33,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:33,724 INFO L225 Difference]: With dead ends: 774 [2021-07-09 17:22:33,724 INFO L226 Difference]: Without dead ends: 764 [2021-07-09 17:22:33,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-07-09 17:22:33,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 506. [2021-07-09 17:22:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-07-09 17:22:33,730 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-07-09 17:22:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:33,730 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-07-09 17:22:33,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-07-09 17:22:33,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:33,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:33,731 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:33,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:33,945 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1692138200, now seen corresponding path program 162 times [2021-07-09 17:22:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:33,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314998818] [2021-07-09 17:22:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:33,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:33,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314998818] [2021-07-09 17:22:33,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314998818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:33,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139469815] [2021-07-09 17:22:33,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:34,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:34,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:34,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139469815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:34,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:34,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424462799] [2021-07-09 17:22:34,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:34,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:34,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:34,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:34,046 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:34,146 INFO L93 Difference]: Finished difference Result 573 states and 1584 transitions. [2021-07-09 17:22:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:22:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:34,147 INFO L225 Difference]: With dead ends: 573 [2021-07-09 17:22:34,147 INFO L226 Difference]: Without dead ends: 573 [2021-07-09 17:22:34,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:22:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-09 17:22:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 506. [2021-07-09 17:22:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.899009900990099) internal successors, (1464), 505 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1464 transitions. [2021-07-09 17:22:34,153 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1464 transitions. Word has length 18 [2021-07-09 17:22:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:34,153 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1464 transitions. [2021-07-09 17:22:34,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1464 transitions. [2021-07-09 17:22:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:34,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:34,153 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:34,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:34,357 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash 712642093, now seen corresponding path program 163 times [2021-07-09 17:22:34,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:34,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345727976] [2021-07-09 17:22:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:34,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345727976] [2021-07-09 17:22:34,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345727976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854676142] [2021-07-09 17:22:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:34,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854676142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:34,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:34,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516255817] [2021-07-09 17:22:34,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:34,463 INFO L87 Difference]: Start difference. First operand 506 states and 1464 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:34,513 INFO L93 Difference]: Finished difference Result 683 states and 1838 transitions. [2021-07-09 17:22:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:22:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:34,514 INFO L225 Difference]: With dead ends: 683 [2021-07-09 17:22:34,514 INFO L226 Difference]: Without dead ends: 671 [2021-07-09 17:22:34,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:22:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-09 17:22:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 504. [2021-07-09 17:22:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9025844930417497) internal successors, (1460), 503 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1460 transitions. [2021-07-09 17:22:34,522 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1460 transitions. Word has length 18 [2021-07-09 17:22:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:34,522 INFO L482 AbstractCegarLoop]: Abstraction has 504 states and 1460 transitions. [2021-07-09 17:22:34,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1460 transitions. [2021-07-09 17:22:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:22:34,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:34,523 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:34,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-07-09 17:22:34,740 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1335371918, now seen corresponding path program 164 times [2021-07-09 17:22:34,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:34,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781086213] [2021-07-09 17:22:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:34,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781086213] [2021-07-09 17:22:34,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781086213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398678150] [2021-07-09 17:22:34,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:34,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:34,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:34,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:22:34,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:34,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398678150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:34,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:34,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:22:34,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199113122] [2021-07-09 17:22:34,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:22:34,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:34,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:22:34,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:22:34,839 INFO L87 Difference]: Start difference. First operand 504 states and 1460 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:34,974 INFO L93 Difference]: Finished difference Result 652 states and 1786 transitions. [2021-07-09 17:22:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:22:34,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:22:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:34,975 INFO L225 Difference]: With dead ends: 652 [2021-07-09 17:22:34,975 INFO L226 Difference]: Without dead ends: 652 [2021-07-09 17:22:34,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-09 17:22:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 525. [2021-07-09 17:22:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.895038167938931) internal successors, (1517), 524 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1517 transitions. [2021-07-09 17:22:34,981 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1517 transitions. Word has length 18 [2021-07-09 17:22:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:34,981 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1517 transitions. [2021-07-09 17:22:34,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1517 transitions. [2021-07-09 17:22:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:34,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:34,982 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:35,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-07-09 17:22:35,183 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1154319608, now seen corresponding path program 165 times [2021-07-09 17:22:35,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:35,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677122547] [2021-07-09 17:22:35,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:35,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:35,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677122547] [2021-07-09 17:22:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677122547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:35,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608423737] [2021-07-09 17:22:35,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:35,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:22:35,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:35,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:35,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:35,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:35,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:35,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:35,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:35,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:35,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:35,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608423737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:35,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:35,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:22:35,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008420107] [2021-07-09 17:22:35,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:22:35,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:22:35,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:22:35,820 INFO L87 Difference]: Start difference. First operand 525 states and 1517 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:22:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:36,154 INFO L93 Difference]: Finished difference Result 604 states and 1671 transitions. [2021-07-09 17:22:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:22:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:36,155 INFO L225 Difference]: With dead ends: 604 [2021-07-09 17:22:36,155 INFO L226 Difference]: Without dead ends: 571 [2021-07-09 17:22:36,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:22:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-09 17:22:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 540. [2021-07-09 17:22:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.8923933209647497) internal successors, (1559), 539 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1559 transitions. [2021-07-09 17:22:36,161 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1559 transitions. Word has length 19 [2021-07-09 17:22:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:36,161 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1559 transitions. [2021-07-09 17:22:36,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:22:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1559 transitions. [2021-07-09 17:22:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:36,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:36,162 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:36,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1762 [2021-07-09 17:22:36,380 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1640517070, now seen corresponding path program 166 times [2021-07-09 17:22:36,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:36,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766578197] [2021-07-09 17:22:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:36,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:36,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766578197] [2021-07-09 17:22:36,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766578197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:36,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641124420] [2021-07-09 17:22:36,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:36,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:36,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:36,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:36,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:36,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:36,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:36,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:36,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:36,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:36,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:36,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641124420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:36,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:36,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:36,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123685724] [2021-07-09 17:22:36,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:36,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:36,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:36,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:36,951 INFO L87 Difference]: Start difference. First operand 540 states and 1559 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:37,237 INFO L93 Difference]: Finished difference Result 625 states and 1734 transitions. [2021-07-09 17:22:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:37,238 INFO L225 Difference]: With dead ends: 625 [2021-07-09 17:22:37,238 INFO L226 Difference]: Without dead ends: 609 [2021-07-09 17:22:37,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-07-09 17:22:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 556. [2021-07-09 17:22:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-07-09 17:22:37,245 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-07-09 17:22:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:37,245 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-07-09 17:22:37,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-07-09 17:22:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:37,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:37,245 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:37,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-07-09 17:22:37,452 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:37,452 INFO L82 PathProgramCache]: Analyzing trace with hash -781642540, now seen corresponding path program 167 times [2021-07-09 17:22:37,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:37,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029605539] [2021-07-09 17:22:37,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:37,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029605539] [2021-07-09 17:22:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029605539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160301333] [2021-07-09 17:22:37,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:37,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:22:37,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:37,546 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:37,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:37,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:37,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:38,060 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:38,060 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:38,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:38,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:38,223 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:38,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:38,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160301333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:38,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:38,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48395078] [2021-07-09 17:22:38,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:38,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:38,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:38,249 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:38,509 INFO L93 Difference]: Finished difference Result 644 states and 1778 transitions. [2021-07-09 17:22:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:38,510 INFO L225 Difference]: With dead ends: 644 [2021-07-09 17:22:38,510 INFO L226 Difference]: Without dead ends: 634 [2021-07-09 17:22:38,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-07-09 17:22:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 556. [2021-07-09 17:22:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.908108108108108) internal successors, (1614), 555 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1614 transitions. [2021-07-09 17:22:38,517 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1614 transitions. Word has length 19 [2021-07-09 17:22:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:38,517 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1614 transitions. [2021-07-09 17:22:38,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1614 transitions. [2021-07-09 17:22:38,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:38,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:38,517 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:38,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1911,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:38,734 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1146496824, now seen corresponding path program 168 times [2021-07-09 17:22:38,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:38,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388519431] [2021-07-09 17:22:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:38,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:38,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388519431] [2021-07-09 17:22:38,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388519431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:38,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824805844] [2021-07-09 17:22:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:38,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:22:38,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:38,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:38,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:39,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:39,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:39,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:39,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824805844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:39,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:39,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:39,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206586917] [2021-07-09 17:22:39,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:39,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:39,257 INFO L87 Difference]: Start difference. First operand 556 states and 1614 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:39,505 INFO L93 Difference]: Finished difference Result 654 states and 1848 transitions. [2021-07-09 17:22:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:39,507 INFO L225 Difference]: With dead ends: 654 [2021-07-09 17:22:39,507 INFO L226 Difference]: Without dead ends: 638 [2021-07-09 17:22:39,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-09 17:22:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 585. [2021-07-09 17:22:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9366438356164384) internal successors, (1715), 584 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1715 transitions. [2021-07-09 17:22:39,515 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1715 transitions. Word has length 19 [2021-07-09 17:22:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:39,515 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1715 transitions. [2021-07-09 17:22:39,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1715 transitions. [2021-07-09 17:22:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:39,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:39,516 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:39,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-07-09 17:22:39,722 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -287622294, now seen corresponding path program 169 times [2021-07-09 17:22:39,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:39,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377761005] [2021-07-09 17:22:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:39,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:39,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377761005] [2021-07-09 17:22:39,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377761005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:39,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853523830] [2021-07-09 17:22:39,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:39,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:39,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:40,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:40,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:40,330 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:40,331 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:40,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:40,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:40,530 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:40,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:40,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853523830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:40,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:40,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:40,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629777966] [2021-07-09 17:22:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:40,556 INFO L87 Difference]: Start difference. First operand 585 states and 1715 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:40,967 INFO L93 Difference]: Finished difference Result 690 states and 1918 transitions. [2021-07-09 17:22:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:40,969 INFO L225 Difference]: With dead ends: 690 [2021-07-09 17:22:40,969 INFO L226 Difference]: Without dead ends: 671 [2021-07-09 17:22:40,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:22:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-09 17:22:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 583. [2021-07-09 17:22:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.929553264604811) internal successors, (1705), 582 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) [2021-07-09 17:22:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1705 transitions. [2021-07-09 17:22:40,976 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1705 transitions. Word has length 19 [2021-07-09 17:22:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:40,976 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1705 transitions. [2021-07-09 17:22:40,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1705 transitions. [2021-07-09 17:22:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:40,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:40,977 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:41,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-07-09 17:22:41,194 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1422991014, now seen corresponding path program 170 times [2021-07-09 17:22:41,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:41,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919157796] [2021-07-09 17:22:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:41,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919157796] [2021-07-09 17:22:41,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919157796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654588699] [2021-07-09 17:22:41,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:41,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:41,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:41,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:41,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:41,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:41,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:41,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:41,751 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:41,751 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:41,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:41,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:41,867 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:41,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:41,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:41,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654588699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:41,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:41,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:41,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725107323] [2021-07-09 17:22:41,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:41,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:41,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:41,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:41,892 INFO L87 Difference]: Start difference. First operand 583 states and 1705 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:42,210 INFO L93 Difference]: Finished difference Result 643 states and 1827 transitions. [2021-07-09 17:22:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:22:42,210 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:42,211 INFO L225 Difference]: With dead ends: 643 [2021-07-09 17:22:42,211 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:22:42,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:22:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:22:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 585. [2021-07-09 17:22:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9297945205479454) internal successors, (1711), 584 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1711 transitions. [2021-07-09 17:22:42,217 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1711 transitions. Word has length 19 [2021-07-09 17:22:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:42,217 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1711 transitions. [2021-07-09 17:22:42,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1711 transitions. [2021-07-09 17:22:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:42,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:42,218 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:42,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:42,434 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:42,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1095619830, now seen corresponding path program 171 times [2021-07-09 17:22:42,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:42,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646296081] [2021-07-09 17:22:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:42,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646296081] [2021-07-09 17:22:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646296081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785969214] [2021-07-09 17:22:42,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:42,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:42,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:42,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:42,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:43,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:43,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:43,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:43,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785969214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:43,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:43,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:22:43,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666970202] [2021-07-09 17:22:43,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:43,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:43,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:43,122 INFO L87 Difference]: Start difference. First operand 585 states and 1711 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:43,314 INFO L93 Difference]: Finished difference Result 619 states and 1761 transitions. [2021-07-09 17:22:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:22:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:43,315 INFO L225 Difference]: With dead ends: 619 [2021-07-09 17:22:43,315 INFO L226 Difference]: Without dead ends: 601 [2021-07-09 17:22:43,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:22:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-07-09 17:22:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 585. [2021-07-09 17:22:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.9263698630136985) internal successors, (1709), 584 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1709 transitions. [2021-07-09 17:22:43,322 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1709 transitions. Word has length 19 [2021-07-09 17:22:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:43,322 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1709 transitions. [2021-07-09 17:22:43,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1709 transitions. [2021-07-09 17:22:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:43,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:43,323 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:43,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2260 [2021-07-09 17:22:43,523 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:43,523 INFO L82 PathProgramCache]: Analyzing trace with hash -980106122, now seen corresponding path program 172 times [2021-07-09 17:22:43,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:43,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338904849] [2021-07-09 17:22:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:43,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:43,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338904849] [2021-07-09 17:22:43,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338904849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:43,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236005656] [2021-07-09 17:22:43,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:43,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:43,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:43,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:43,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:43,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:43,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:44,091 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:44,091 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:44,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:44,424 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:44,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:44,424 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:44,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236005656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:44,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:44,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:44,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504727345] [2021-07-09 17:22:44,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:44,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:44,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:44,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:44,448 INFO L87 Difference]: Start difference. First operand 585 states and 1709 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:44,825 INFO L93 Difference]: Finished difference Result 693 states and 1917 transitions. [2021-07-09 17:22:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:22:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:44,826 INFO L225 Difference]: With dead ends: 693 [2021-07-09 17:22:44,826 INFO L226 Difference]: Without dead ends: 683 [2021-07-09 17:22:44,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:22:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-09 17:22:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 588. [2021-07-09 17:22:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.9165247018739353) internal successors, (1712), 587 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1712 transitions. [2021-07-09 17:22:44,833 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1712 transitions. Word has length 19 [2021-07-09 17:22:44,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:44,833 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1712 transitions. [2021-07-09 17:22:44,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1712 transitions. [2021-07-09 17:22:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:44,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:44,834 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:45,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-07-09 17:22:45,050 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:45,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1283228914, now seen corresponding path program 173 times [2021-07-09 17:22:45,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:45,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505314889] [2021-07-09 17:22:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:45,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:45,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505314889] [2021-07-09 17:22:45,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505314889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:45,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062996634] [2021-07-09 17:22:45,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:45,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:45,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:45,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:45,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:45,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:45,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:45,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:45,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:45,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:45,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062996634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:45,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:45,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:45,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567499254] [2021-07-09 17:22:45,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:45,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:45,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:45,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:45,584 INFO L87 Difference]: Start difference. First operand 588 states and 1712 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:45,919 INFO L93 Difference]: Finished difference Result 698 states and 1984 transitions. [2021-07-09 17:22:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:45,920 INFO L225 Difference]: With dead ends: 698 [2021-07-09 17:22:45,920 INFO L226 Difference]: Without dead ends: 680 [2021-07-09 17:22:45,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-09 17:22:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 625. [2021-07-09 17:22:45,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.948717948717949) internal successors, (1840), 624 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1840 transitions. [2021-07-09 17:22:45,929 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1840 transitions. Word has length 19 [2021-07-09 17:22:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:45,929 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1840 transitions. [2021-07-09 17:22:45,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1840 transitions. [2021-07-09 17:22:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:45,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:45,930 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:46,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:46,133 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2142103444, now seen corresponding path program 174 times [2021-07-09 17:22:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:46,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293362334] [2021-07-09 17:22:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:46,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293362334] [2021-07-09 17:22:46,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293362334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202588176] [2021-07-09 17:22:46,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:46,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:46,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:22:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:46,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:46,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:46,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:46,650 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:46,651 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:46,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:46,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:46,865 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:46,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:46,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202588176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:46,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:46,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:46,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204966663] [2021-07-09 17:22:46,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:46,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:46,892 INFO L87 Difference]: Start difference. First operand 625 states and 1840 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:47,385 INFO L93 Difference]: Finished difference Result 768 states and 2131 transitions. [2021-07-09 17:22:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:22:47,385 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:47,386 INFO L225 Difference]: With dead ends: 768 [2021-07-09 17:22:47,386 INFO L226 Difference]: Without dead ends: 742 [2021-07-09 17:22:47,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:22:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-09 17:22:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 627. [2021-07-09 17:22:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.9472843450479234) internal successors, (1845), 626 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1845 transitions. [2021-07-09 17:22:47,394 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1845 transitions. Word has length 19 [2021-07-09 17:22:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:47,394 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1845 transitions. [2021-07-09 17:22:47,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1845 transitions. [2021-07-09 17:22:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:47,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:47,395 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:47,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2531 [2021-07-09 17:22:47,611 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash -442250544, now seen corresponding path program 175 times [2021-07-09 17:22:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:47,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472197528] [2021-07-09 17:22:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:47,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:47,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472197528] [2021-07-09 17:22:47,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472197528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:47,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020630575] [2021-07-09 17:22:47,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:47,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:47,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:48,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:48,271 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:48,272 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:48,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:48,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:48,606 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:48,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:48,607 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:48,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020630575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:48,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:48,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:22:48,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552846470] [2021-07-09 17:22:48,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:22:48,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:48,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:22:48,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:48,632 INFO L87 Difference]: Start difference. First operand 627 states and 1845 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:49,197 INFO L93 Difference]: Finished difference Result 816 states and 2235 transitions. [2021-07-09 17:22:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:22:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:22:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:49,199 INFO L225 Difference]: With dead ends: 816 [2021-07-09 17:22:49,199 INFO L226 Difference]: Without dead ends: 783 [2021-07-09 17:22:49,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:22:49,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-07-09 17:22:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 619. [2021-07-09 17:22:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.9352750809061487) internal successors, (1814), 618 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1814 transitions. [2021-07-09 17:22:49,206 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1814 transitions. Word has length 19 [2021-07-09 17:22:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:49,206 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 1814 transitions. [2021-07-09 17:22:49,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1814 transitions. [2021-07-09 17:22:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:49,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:49,207 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:49,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2634,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:49,423 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:49,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1047154452, now seen corresponding path program 176 times [2021-07-09 17:22:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:49,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266102413] [2021-07-09 17:22:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:49,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:49,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266102413] [2021-07-09 17:22:49,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266102413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:49,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870825431] [2021-07-09 17:22:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:49,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:49,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:49,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:49,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:49,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:49,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:50,081 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:50,082 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:50,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:50,185 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:50,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:50,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:50,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870825431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:50,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:50,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:22:50,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315996758] [2021-07-09 17:22:50,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:22:50,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:50,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:22:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:50,211 INFO L87 Difference]: Start difference. First operand 619 states and 1814 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:50,633 INFO L93 Difference]: Finished difference Result 731 states and 2045 transitions. [2021-07-09 17:22:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:22:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:22:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:50,634 INFO L225 Difference]: With dead ends: 731 [2021-07-09 17:22:50,634 INFO L226 Difference]: Without dead ends: 721 [2021-07-09 17:22:50,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:22:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-09 17:22:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 621. [2021-07-09 17:22:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.935483870967742) internal successors, (1820), 620 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1820 transitions. [2021-07-09 17:22:50,642 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1820 transitions. Word has length 19 [2021-07-09 17:22:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:50,642 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1820 transitions. [2021-07-09 17:22:50,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1820 transitions. [2021-07-09 17:22:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:50,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:50,643 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:50,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2779,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:50,860 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:50,860 INFO L82 PathProgramCache]: Analyzing trace with hash -385947354, now seen corresponding path program 177 times [2021-07-09 17:22:50,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:50,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661702224] [2021-07-09 17:22:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:22:50,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:50,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661702224] [2021-07-09 17:22:50,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661702224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:50,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024778139] [2021-07-09 17:22:50,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:50,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:22:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:50,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:51,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:51,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:51,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:51,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:51,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:51,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:51,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024778139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:51,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:51,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:22:51,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638689452] [2021-07-09 17:22:51,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:22:51,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:51,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:22:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:22:51,400 INFO L87 Difference]: Start difference. First operand 621 states and 1820 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:51,642 INFO L93 Difference]: Finished difference Result 649 states and 1861 transitions. [2021-07-09 17:22:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:22:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:22:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:51,644 INFO L225 Difference]: With dead ends: 649 [2021-07-09 17:22:51,644 INFO L226 Difference]: Without dead ends: 631 [2021-07-09 17:22:51,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:22:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-09 17:22:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 621. [2021-07-09 17:22:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.9338709677419357) internal successors, (1819), 620 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1819 transitions. [2021-07-09 17:22:51,651 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1819 transitions. Word has length 19 [2021-07-09 17:22:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:51,652 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1819 transitions. [2021-07-09 17:22:51,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1819 transitions. [2021-07-09 17:22:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:51,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:51,652 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:51,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2886,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:51,869 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash -434412732, now seen corresponding path program 178 times [2021-07-09 17:22:51,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:51,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509683524] [2021-07-09 17:22:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:51,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509683524] [2021-07-09 17:22:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509683524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:51,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606058104] [2021-07-09 17:22:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:51,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:22:51,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:51,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:52,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:52,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:52,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:52,462 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:52,462 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:52,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:52,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:52,791 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:52,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:52,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:52,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606058104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:52,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:52,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:22:52,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839891108] [2021-07-09 17:22:52,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:22:52,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:52,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:22:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:52,817 INFO L87 Difference]: Start difference. First operand 621 states and 1819 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:53,405 INFO L93 Difference]: Finished difference Result 789 states and 2195 transitions. [2021-07-09 17:22:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:22:53,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:22:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:53,407 INFO L225 Difference]: With dead ends: 789 [2021-07-09 17:22:53,407 INFO L226 Difference]: Without dead ends: 779 [2021-07-09 17:22:53,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:22:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-07-09 17:22:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 622. [2021-07-09 17:22:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.9355877616747184) internal successors, (1823), 621 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1823 transitions. [2021-07-09 17:22:53,432 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1823 transitions. Word has length 19 [2021-07-09 17:22:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:53,432 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1823 transitions. [2021-07-09 17:22:53,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1823 transitions. [2021-07-09 17:22:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:53,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:53,433 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:53,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:53,649 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:53,650 INFO L82 PathProgramCache]: Analyzing trace with hash -704684536, now seen corresponding path program 179 times [2021-07-09 17:22:53,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:53,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851275770] [2021-07-09 17:22:53,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:53,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:53,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851275770] [2021-07-09 17:22:53,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851275770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:53,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444872441] [2021-07-09 17:22:53,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:53,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:22:53,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:53,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:53,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:54,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:54,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:54,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:54,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:22:54,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:22:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444872441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:54,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:54,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:54,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245112051] [2021-07-09 17:22:54,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:54,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:54,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:54,136 INFO L87 Difference]: Start difference. First operand 622 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:54,450 INFO L93 Difference]: Finished difference Result 716 states and 2072 transitions. [2021-07-09 17:22:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:22:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:54,452 INFO L225 Difference]: With dead ends: 716 [2021-07-09 17:22:54,452 INFO L226 Difference]: Without dead ends: 700 [2021-07-09 17:22:54,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:22:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-07-09 17:22:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 661. [2021-07-09 17:22:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.9681818181818183) internal successors, (1959), 660 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1959 transitions. [2021-07-09 17:22:54,461 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1959 transitions. Word has length 19 [2021-07-09 17:22:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:54,461 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1959 transitions. [2021-07-09 17:22:54,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1959 transitions. [2021-07-09 17:22:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:54,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:54,462 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:54,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-07-09 17:22:54,677 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash 154189994, now seen corresponding path program 180 times [2021-07-09 17:22:54,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:54,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649027774] [2021-07-09 17:22:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649027774] [2021-07-09 17:22:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649027774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046252036] [2021-07-09 17:22:54,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:54,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:22:54,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:54,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:22:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:55,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:55,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:55,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:55,347 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:55,347 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:55,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:55,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:55,479 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:55,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:55,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046252036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:55,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:55,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123631451] [2021-07-09 17:22:55,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:55,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:55,505 INFO L87 Difference]: Start difference. First operand 661 states and 1959 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:56,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:56,291 INFO L93 Difference]: Finished difference Result 807 states and 2279 transitions. [2021-07-09 17:22:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:22:56,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:56,293 INFO L225 Difference]: With dead ends: 807 [2021-07-09 17:22:56,293 INFO L226 Difference]: Without dead ends: 781 [2021-07-09 17:22:56,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:22:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-07-09 17:22:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 667. [2021-07-09 17:22:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.9684684684684686) internal successors, (1977), 666 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1977 transitions. [2021-07-09 17:22:56,301 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1977 transitions. Word has length 19 [2021-07-09 17:22:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:56,302 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 1977 transitions. [2021-07-09 17:22:56,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1977 transitions. [2021-07-09 17:22:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:56,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:56,302 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:56,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3137 [2021-07-09 17:22:56,519 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:56,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1864803302, now seen corresponding path program 181 times [2021-07-09 17:22:56,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:56,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022415285] [2021-07-09 17:22:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:22:56,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:56,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022415285] [2021-07-09 17:22:56,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022415285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:56,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141573106] [2021-07-09 17:22:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:56,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:56,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:56,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:56,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:57,114 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:57,115 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:57,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:57,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:57,258 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:57,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:57,259 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:57,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141573106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:57,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:57,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:22:57,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601526000] [2021-07-09 17:22:57,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:22:57,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:57,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:22:57,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:22:57,284 INFO L87 Difference]: Start difference. First operand 667 states and 1977 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:57,804 INFO L93 Difference]: Finished difference Result 766 states and 2183 transitions. [2021-07-09 17:22:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:22:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:22:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:57,806 INFO L225 Difference]: With dead ends: 766 [2021-07-09 17:22:57,806 INFO L226 Difference]: Without dead ends: 756 [2021-07-09 17:22:57,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:22:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-07-09 17:22:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 675. [2021-07-09 17:22:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 2.970326409495549) internal successors, (2002), 674 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2002 transitions. [2021-07-09 17:22:57,813 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2002 transitions. Word has length 19 [2021-07-09 17:22:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:57,813 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2002 transitions. [2021-07-09 17:22:57,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:22:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2002 transitions. [2021-07-09 17:22:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:57,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:57,814 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:58,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:58,030 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:58,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash -940758998, now seen corresponding path program 182 times [2021-07-09 17:22:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:58,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642490106] [2021-07-09 17:22:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:58,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:58,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642490106] [2021-07-09 17:22:58,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642490106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:58,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679916631] [2021-07-09 17:22:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:58,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:22:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:58,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:58,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:22:58,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:22:58,652 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:22:58,653 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:22:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:22:58,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:22:58,755 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:22:58,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:22:58,756 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:22:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:58,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679916631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:58,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:22:58,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:22:58,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357367417] [2021-07-09 17:22:58,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:22:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:22:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:22:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:22:58,781 INFO L87 Difference]: Start difference. First operand 675 states and 2002 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:22:59,366 INFO L93 Difference]: Finished difference Result 837 states and 2353 transitions. [2021-07-09 17:22:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:22:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:22:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:22:59,368 INFO L225 Difference]: With dead ends: 837 [2021-07-09 17:22:59,368 INFO L226 Difference]: Without dead ends: 808 [2021-07-09 17:22:59,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:22:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-07-09 17:22:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 670. [2021-07-09 17:22:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.968609865470852) internal successors, (1986), 669 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:22:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1986 transitions. [2021-07-09 17:22:59,376 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1986 transitions. Word has length 19 [2021-07-09 17:22:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:22:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 1986 transitions. [2021-07-09 17:22:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:22:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1986 transitions. [2021-07-09 17:22:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:22:59,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:22:59,377 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:22:59,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:59,593 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:22:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:22:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2013844378, now seen corresponding path program 183 times [2021-07-09 17:22:59,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:22:59,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786713488] [2021-07-09 17:22:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:22:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:22:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:22:59,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:22:59,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786713488] [2021-07-09 17:22:59,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786713488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:22:59,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392859366] [2021-07-09 17:22:59,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:22:59,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:22:59,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:22:59,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:22:59,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:22:59,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:22:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:00,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:00,254 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:00,255 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:00,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:00,379 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:00,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:00,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:00,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392859366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:00,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:00,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:00,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607358045] [2021-07-09 17:23:00,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:00,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:00,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:00,408 INFO L87 Difference]: Start difference. First operand 670 states and 1986 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:00,921 INFO L93 Difference]: Finished difference Result 781 states and 2228 transitions. [2021-07-09 17:23:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:23:00,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:00,922 INFO L225 Difference]: With dead ends: 781 [2021-07-09 17:23:00,922 INFO L226 Difference]: Without dead ends: 771 [2021-07-09 17:23:00,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:23:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-09 17:23:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 671. [2021-07-09 17:23:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.9686567164179105) internal successors, (1989), 670 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1989 transitions. [2021-07-09 17:23:00,930 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1989 transitions. Word has length 19 [2021-07-09 17:23:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:00,930 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1989 transitions. [2021-07-09 17:23:00,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1989 transitions. [2021-07-09 17:23:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:00,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:00,931 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:01,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:01,147 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash -806481870, now seen corresponding path program 184 times [2021-07-09 17:23:01,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:01,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818336552] [2021-07-09 17:23:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:01,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818336552] [2021-07-09 17:23:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818336552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594296745] [2021-07-09 17:23:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:01,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:01,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:01,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:01,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:01,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:01,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:01,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:01,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594296745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:01,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:01,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035472142] [2021-07-09 17:23:01,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:01,798 INFO L87 Difference]: Start difference. First operand 671 states and 1989 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:02,085 INFO L93 Difference]: Finished difference Result 702 states and 2034 transitions. [2021-07-09 17:23:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 17:23:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:02,086 INFO L225 Difference]: With dead ends: 702 [2021-07-09 17:23:02,086 INFO L226 Difference]: Without dead ends: 680 [2021-07-09 17:23:02,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:23:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-09 17:23:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 671. [2021-07-09 17:23:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.967164179104478) internal successors, (1988), 670 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1988 transitions. [2021-07-09 17:23:02,094 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1988 transitions. Word has length 19 [2021-07-09 17:23:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:02,094 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 1988 transitions. [2021-07-09 17:23:02,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1988 transitions. [2021-07-09 17:23:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:02,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:02,095 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:02,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3561,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:02,311 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 153350736, now seen corresponding path program 185 times [2021-07-09 17:23:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:02,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775237195] [2021-07-09 17:23:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:02,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775237195] [2021-07-09 17:23:02,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775237195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069848183] [2021-07-09 17:23:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:02,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:23:02,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:02,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:02,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:02,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:02,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:02,878 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:02,878 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:02,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:03,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:03,050 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:03,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:03,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:03,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069848183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:03,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:03,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:03,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722867333] [2021-07-09 17:23:03,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:03,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:03,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:03,076 INFO L87 Difference]: Start difference. First operand 671 states and 1988 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:03,719 INFO L93 Difference]: Finished difference Result 827 states and 2298 transitions. [2021-07-09 17:23:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:23:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:03,721 INFO L225 Difference]: With dead ends: 827 [2021-07-09 17:23:03,721 INFO L226 Difference]: Without dead ends: 805 [2021-07-09 17:23:03,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:23:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-07-09 17:23:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 670. [2021-07-09 17:23:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 2.9626307922272046) internal successors, (1982), 669 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1982 transitions. [2021-07-09 17:23:03,729 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1982 transitions. Word has length 19 [2021-07-09 17:23:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:03,729 INFO L482 AbstractCegarLoop]: Abstraction has 670 states and 1982 transitions. [2021-07-09 17:23:03,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1982 transitions. [2021-07-09 17:23:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:03,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:03,730 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:03,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3637 [2021-07-09 17:23:03,946 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:03,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1642755732, now seen corresponding path program 186 times [2021-07-09 17:23:03,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:03,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840694286] [2021-07-09 17:23:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:04,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:04,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840694286] [2021-07-09 17:23:04,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840694286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:04,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688126489] [2021-07-09 17:23:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:04,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:23:04,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:04,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:04,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:04,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:04,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:04,648 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:04,648 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:04,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:04,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:04,768 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:04,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:04,768 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:04,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688126489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:04,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:04,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:04,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341328015] [2021-07-09 17:23:04,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:04,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:04,793 INFO L87 Difference]: Start difference. First operand 670 states and 1982 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:05,447 INFO L93 Difference]: Finished difference Result 855 states and 2368 transitions. [2021-07-09 17:23:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:23:05,447 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:05,448 INFO L225 Difference]: With dead ends: 855 [2021-07-09 17:23:05,449 INFO L226 Difference]: Without dead ends: 826 [2021-07-09 17:23:05,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 582.4ms TimeCoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-07-09 17:23:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 662. [2021-07-09 17:23:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 2.9531013615733737) internal successors, (1952), 661 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) [2021-07-09 17:23:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1952 transitions. [2021-07-09 17:23:05,457 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1952 transitions. Word has length 19 [2021-07-09 17:23:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:05,457 INFO L482 AbstractCegarLoop]: Abstraction has 662 states and 1952 transitions. [2021-07-09 17:23:05,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1952 transitions. [2021-07-09 17:23:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:05,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:05,458 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:05,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3734,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:05,660 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash 569670352, now seen corresponding path program 187 times [2021-07-09 17:23:05,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:05,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588627112] [2021-07-09 17:23:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:05,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588627112] [2021-07-09 17:23:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588627112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694390688] [2021-07-09 17:23:05,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:05,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:06,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:06,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:06,319 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:06,320 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:06,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:06,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:06,416 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:06,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:06,417 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694390688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:06,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:06,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:06,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377070707] [2021-07-09 17:23:06,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:06,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:06,442 INFO L87 Difference]: Start difference. First operand 662 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:06,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:06,956 INFO L93 Difference]: Finished difference Result 809 states and 2278 transitions. [2021-07-09 17:23:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:23:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:06,958 INFO L225 Difference]: With dead ends: 809 [2021-07-09 17:23:06,958 INFO L226 Difference]: Without dead ends: 799 [2021-07-09 17:23:06,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:23:06,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-07-09 17:23:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 666. [2021-07-09 17:23:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.948872180451128) internal successors, (1961), 665 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1961 transitions. [2021-07-09 17:23:06,966 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1961 transitions. Word has length 19 [2021-07-09 17:23:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:06,966 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1961 transitions. [2021-07-09 17:23:06,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1961 transitions. [2021-07-09 17:23:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:06,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:06,967 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:07,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:07,183 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash -697786826, now seen corresponding path program 188 times [2021-07-09 17:23:07,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:07,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998158841] [2021-07-09 17:23:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:07,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998158841] [2021-07-09 17:23:07,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998158841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014663558] [2021-07-09 17:23:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:07,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:07,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:07,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:07,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:07,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:07,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:07,865 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:07,865 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:07,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:07,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:08,008 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:08,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:08,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014663558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:08,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:08,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:08,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849190867] [2021-07-09 17:23:08,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:08,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:08,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:08,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:08,035 INFO L87 Difference]: Start difference. First operand 666 states and 1961 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:08,782 INFO L93 Difference]: Finished difference Result 905 states and 2517 transitions. [2021-07-09 17:23:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:23:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:08,784 INFO L225 Difference]: With dead ends: 905 [2021-07-09 17:23:08,785 INFO L226 Difference]: Without dead ends: 895 [2021-07-09 17:23:08,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:23:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-07-09 17:23:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 667. [2021-07-09 17:23:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.951951951951952) internal successors, (1966), 666 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1966 transitions. [2021-07-09 17:23:08,793 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1966 transitions. Word has length 19 [2021-07-09 17:23:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:08,793 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 1966 transitions. [2021-07-09 17:23:08,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1966 transitions. [2021-07-09 17:23:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:08,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:08,794 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:09,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-07-09 17:23:09,011 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:09,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2094507954, now seen corresponding path program 189 times [2021-07-09 17:23:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:09,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486411650] [2021-07-09 17:23:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:09,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486411650] [2021-07-09 17:23:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486411650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685206924] [2021-07-09 17:23:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:09,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:09,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:09,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:09,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:09,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:09,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:09,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:09,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685206924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:09,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:09,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:09,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258911212] [2021-07-09 17:23:09,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:09,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:09,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:09,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:09,510 INFO L87 Difference]: Start difference. First operand 667 states and 1966 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:09,857 INFO L93 Difference]: Finished difference Result 778 states and 2267 transitions. [2021-07-09 17:23:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:09,858 INFO L225 Difference]: With dead ends: 778 [2021-07-09 17:23:09,858 INFO L226 Difference]: Without dead ends: 760 [2021-07-09 17:23:09,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:23:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-09 17:23:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 721. [2021-07-09 17:23:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.9875) internal successors, (2151), 720 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2151 transitions. [2021-07-09 17:23:09,867 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2151 transitions. Word has length 19 [2021-07-09 17:23:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:09,867 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2151 transitions. [2021-07-09 17:23:09,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2151 transitions. [2021-07-09 17:23:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:09,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:09,868 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:10,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:10,081 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1341584812, now seen corresponding path program 190 times [2021-07-09 17:23:10,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:10,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394707644] [2021-07-09 17:23:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:10,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:10,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394707644] [2021-07-09 17:23:10,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394707644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:10,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455922466] [2021-07-09 17:23:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:10,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:10,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:10,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:10,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:10,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:10,668 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:10,668 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:10,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:10,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:10,852 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:10,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:10,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:10,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455922466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:10,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:10,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:10,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934081562] [2021-07-09 17:23:10,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:10,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:10,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:10,878 INFO L87 Difference]: Start difference. First operand 721 states and 2151 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:11,839 INFO L93 Difference]: Finished difference Result 908 states and 2570 transitions. [2021-07-09 17:23:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:23:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:11,841 INFO L225 Difference]: With dead ends: 908 [2021-07-09 17:23:11,841 INFO L226 Difference]: Without dead ends: 875 [2021-07-09 17:23:11,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:23:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-09 17:23:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 729. [2021-07-09 17:23:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.993131868131868) internal successors, (2179), 728 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2179 transitions. [2021-07-09 17:23:11,849 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2179 transitions. Word has length 19 [2021-07-09 17:23:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:11,849 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2179 transitions. [2021-07-09 17:23:11,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2179 transitions. [2021-07-09 17:23:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:11,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:11,850 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:12,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-07-09 17:23:12,067 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash 369028496, now seen corresponding path program 191 times [2021-07-09 17:23:12,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:12,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551129146] [2021-07-09 17:23:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:12,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:12,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551129146] [2021-07-09 17:23:12,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551129146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:12,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652022825] [2021-07-09 17:23:12,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:12,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:12,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:12,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:12,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:12,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:12,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:12,705 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:12,706 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:12,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:12,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:12,893 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:12,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:12,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:12,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652022825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:12,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:12,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280043731] [2021-07-09 17:23:12,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:12,921 INFO L87 Difference]: Start difference. First operand 729 states and 2179 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:13,949 INFO L93 Difference]: Finished difference Result 1020 states and 2819 transitions. [2021-07-09 17:23:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:23:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:13,951 INFO L225 Difference]: With dead ends: 1020 [2021-07-09 17:23:13,951 INFO L226 Difference]: Without dead ends: 973 [2021-07-09 17:23:13,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:23:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-07-09 17:23:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 738. [2021-07-09 17:23:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.983717774762551) internal successors, (2199), 737 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2199 transitions. [2021-07-09 17:23:13,960 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2199 transitions. Word has length 19 [2021-07-09 17:23:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:13,960 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2199 transitions. [2021-07-09 17:23:13,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2199 transitions. [2021-07-09 17:23:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:13,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:13,961 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:14,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4184 [2021-07-09 17:23:14,178 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1858433492, now seen corresponding path program 192 times [2021-07-09 17:23:14,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:14,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339444926] [2021-07-09 17:23:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:14,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:14,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339444926] [2021-07-09 17:23:14,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339444926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:14,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070165087] [2021-07-09 17:23:14,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:14,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:23:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:14,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:14,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:14,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:14,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:15,002 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:15,002 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:15,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:15,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:15,209 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:15,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:15,210 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:15,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070165087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:15,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:15,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:15,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110666124] [2021-07-09 17:23:15,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:15,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:15,234 INFO L87 Difference]: Start difference. First operand 738 states and 2199 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:15,860 INFO L93 Difference]: Finished difference Result 871 states and 2475 transitions. [2021-07-09 17:23:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:23:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:15,861 INFO L225 Difference]: With dead ends: 871 [2021-07-09 17:23:15,861 INFO L226 Difference]: Without dead ends: 856 [2021-07-09 17:23:15,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-07-09 17:23:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 743. [2021-07-09 17:23:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.981132075471698) internal successors, (2212), 742 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2212 transitions. [2021-07-09 17:23:15,870 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2212 transitions. Word has length 19 [2021-07-09 17:23:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:15,870 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2212 transitions. [2021-07-09 17:23:15,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2212 transitions. [2021-07-09 17:23:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:15,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:15,871 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:16,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4294 [2021-07-09 17:23:16,087 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:16,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash 785348112, now seen corresponding path program 193 times [2021-07-09 17:23:16,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:16,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983123551] [2021-07-09 17:23:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:16,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:16,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983123551] [2021-07-09 17:23:16,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983123551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:16,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21522369] [2021-07-09 17:23:16,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:16,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:16,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:16,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:16,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:16,700 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:16,700 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:16,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:17,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:17,226 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:17,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:17,227 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:17,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21522369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:17,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:17,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855406563] [2021-07-09 17:23:17,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:17,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:17,253 INFO L87 Difference]: Start difference. First operand 743 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:17,957 INFO L93 Difference]: Finished difference Result 917 states and 2588 transitions. [2021-07-09 17:23:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:23:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:17,959 INFO L225 Difference]: With dead ends: 917 [2021-07-09 17:23:17,959 INFO L226 Difference]: Without dead ends: 895 [2021-07-09 17:23:17,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:23:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-07-09 17:23:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 742. [2021-07-09 17:23:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-07-09 17:23:17,970 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-07-09 17:23:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:17,970 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-07-09 17:23:17,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-07-09 17:23:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:17,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:17,971 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:18,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4448,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:18,191 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:18,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1879439700, now seen corresponding path program 194 times [2021-07-09 17:23:18,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:18,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208554983] [2021-07-09 17:23:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:18,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:18,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208554983] [2021-07-09 17:23:18,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208554983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:18,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764570232] [2021-07-09 17:23:18,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:18,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:18,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:18,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:18,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:18,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:18,837 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:18,837 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:18,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:18,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:19,003 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:19,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:19,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764570232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:19,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:19,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:19,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753741204] [2021-07-09 17:23:19,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:19,029 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:19,630 INFO L93 Difference]: Finished difference Result 882 states and 2522 transitions. [2021-07-09 17:23:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:23:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:19,632 INFO L225 Difference]: With dead ends: 882 [2021-07-09 17:23:19,632 INFO L226 Difference]: Without dead ends: 872 [2021-07-09 17:23:19,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:23:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-07-09 17:23:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 742. [2021-07-09 17:23:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.9851551956815117) internal successors, (2212), 741 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2212 transitions. [2021-07-09 17:23:19,646 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2212 transitions. Word has length 19 [2021-07-09 17:23:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:19,646 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2212 transitions. [2021-07-09 17:23:19,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2212 transitions. [2021-07-09 17:23:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:19,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:19,647 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:19,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4610,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:19,848 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:19,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1973063432, now seen corresponding path program 195 times [2021-07-09 17:23:19,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:19,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290604883] [2021-07-09 17:23:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:19,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290604883] [2021-07-09 17:23:19,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290604883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446777813] [2021-07-09 17:23:19,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:19,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:19,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:19,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:20,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:20,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:20,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:20,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:20,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:20,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:20,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446777813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:20,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:20,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51399855] [2021-07-09 17:23:20,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:20,382 INFO L87 Difference]: Start difference. First operand 742 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:20,793 INFO L93 Difference]: Finished difference Result 781 states and 2273 transitions. [2021-07-09 17:23:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:20,796 INFO L225 Difference]: With dead ends: 781 [2021-07-09 17:23:20,796 INFO L226 Difference]: Without dead ends: 759 [2021-07-09 17:23:20,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 394.8ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:23:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-09 17:23:20,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 742. [2021-07-09 17:23:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.982456140350877) internal successors, (2210), 741 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2210 transitions. [2021-07-09 17:23:20,824 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2210 transitions. Word has length 19 [2021-07-09 17:23:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:20,824 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2210 transitions. [2021-07-09 17:23:20,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2210 transitions. [2021-07-09 17:23:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:20,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:20,825 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:21,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4719 [2021-07-09 17:23:21,041 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 343011498, now seen corresponding path program 196 times [2021-07-09 17:23:21,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:21,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417400329] [2021-07-09 17:23:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:21,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417400329] [2021-07-09 17:23:21,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417400329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:21,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435621695] [2021-07-09 17:23:21,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:21,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:21,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:21,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:21,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:21,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:21,678 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:21,679 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:21,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:21,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:21,904 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:21,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:21,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:21,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435621695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:21,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:21,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:21,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825313835] [2021-07-09 17:23:21,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:21,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:21,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:21,930 INFO L87 Difference]: Start difference. First operand 742 states and 2210 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:22,831 INFO L93 Difference]: Finished difference Result 986 states and 2710 transitions. [2021-07-09 17:23:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:23:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:22,833 INFO L225 Difference]: With dead ends: 986 [2021-07-09 17:23:22,833 INFO L226 Difference]: Without dead ends: 945 [2021-07-09 17:23:22,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 788.7ms TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:23:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-09 17:23:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 738. [2021-07-09 17:23:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.976933514246947) internal successors, (2194), 737 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2194 transitions. [2021-07-09 17:23:22,843 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2194 transitions. Word has length 19 [2021-07-09 17:23:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:22,843 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2194 transitions. [2021-07-09 17:23:22,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2194 transitions. [2021-07-09 17:23:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:22,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:22,844 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:23,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4768,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:23,059 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:23,059 INFO L82 PathProgramCache]: Analyzing trace with hash -730073882, now seen corresponding path program 197 times [2021-07-09 17:23:23,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:23,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937263911] [2021-07-09 17:23:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:23,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:23,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937263911] [2021-07-09 17:23:23,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937263911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:23,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821717725] [2021-07-09 17:23:23,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:23,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:23,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:23,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:23,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:23,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:23,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:23,715 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:23,715 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:24,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:24,019 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:24,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:24,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821717725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:24,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:24,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:24,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975007002] [2021-07-09 17:23:24,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:24,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:24,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:24,045 INFO L87 Difference]: Start difference. First operand 738 states and 2194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:24,877 INFO L93 Difference]: Finished difference Result 978 states and 2744 transitions. [2021-07-09 17:23:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:23:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:24,879 INFO L225 Difference]: With dead ends: 978 [2021-07-09 17:23:24,879 INFO L226 Difference]: Without dead ends: 947 [2021-07-09 17:23:24,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:23:24,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-07-09 17:23:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 716. [2021-07-09 17:23:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.9762237762237764) internal successors, (2128), 715 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2128 transitions. [2021-07-09 17:23:24,887 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2128 transitions. Word has length 19 [2021-07-09 17:23:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:24,887 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2128 transitions. [2021-07-09 17:23:24,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2128 transitions. [2021-07-09 17:23:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:24,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:24,888 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:25,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4878 [2021-07-09 17:23:25,105 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 364017706, now seen corresponding path program 198 times [2021-07-09 17:23:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:25,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276137233] [2021-07-09 17:23:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:25,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276137233] [2021-07-09 17:23:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276137233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515720455] [2021-07-09 17:23:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:25,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:25,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:25,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:25,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:25,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:25,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:25,736 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:25,736 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:25,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:25,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:25,816 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:25,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:25,816 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:25,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515720455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:25,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:25,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:25,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558497424] [2021-07-09 17:23:25,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:25,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:25,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:25,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:25,842 INFO L87 Difference]: Start difference. First operand 716 states and 2128 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:26,467 INFO L93 Difference]: Finished difference Result 934 states and 2662 transitions. [2021-07-09 17:23:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:23:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:26,468 INFO L225 Difference]: With dead ends: 934 [2021-07-09 17:23:26,468 INFO L226 Difference]: Without dead ends: 924 [2021-07-09 17:23:26,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:23:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-07-09 17:23:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 719. [2021-07-09 17:23:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9763231197771587) internal successors, (2137), 718 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2137 transitions. [2021-07-09 17:23:26,477 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2137 transitions. Word has length 19 [2021-07-09 17:23:26,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:26,477 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2137 transitions. [2021-07-09 17:23:26,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2137 transitions. [2021-07-09 17:23:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:26,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:26,478 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:26,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:26,695 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1221778650, now seen corresponding path program 199 times [2021-07-09 17:23:26,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:26,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357136930] [2021-07-09 17:23:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:26,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:26,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357136930] [2021-07-09 17:23:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357136930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:26,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79925901] [2021-07-09 17:23:26,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:26,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:27,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:27,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:27,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:27,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:27,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:27,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79925901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:27,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540863863] [2021-07-09 17:23:27,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:27,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:27,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:27,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:27,191 INFO L87 Difference]: Start difference. First operand 719 states and 2137 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:27,480 INFO L93 Difference]: Finished difference Result 746 states and 2179 transitions. [2021-07-09 17:23:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:27,481 INFO L225 Difference]: With dead ends: 746 [2021-07-09 17:23:27,481 INFO L226 Difference]: Without dead ends: 728 [2021-07-09 17:23:27,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:23:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-07-09 17:23:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 719. [2021-07-09 17:23:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.9749303621169916) internal successors, (2136), 718 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2136 transitions. [2021-07-09 17:23:27,489 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2136 transitions. Word has length 19 [2021-07-09 17:23:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:27,489 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2136 transitions. [2021-07-09 17:23:27,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2136 transitions. [2021-07-09 17:23:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:27,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:27,490 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:27,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5115,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,711 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -272449148, now seen corresponding path program 200 times [2021-07-09 17:23:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:27,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162545401] [2021-07-09 17:23:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:27,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:27,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162545401] [2021-07-09 17:23:27,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162545401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:27,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121961560] [2021-07-09 17:23:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:27,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:27,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:27,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:28,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:28,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:28,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:28,546 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:28,546 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:28,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:28,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:28,637 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:28,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:28,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:28,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121961560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:28,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:28,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:28,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638614338] [2021-07-09 17:23:28,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:28,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:28,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:28,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:28,664 INFO L87 Difference]: Start difference. First operand 719 states and 2136 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:29,432 INFO L93 Difference]: Finished difference Result 991 states and 2826 transitions. [2021-07-09 17:23:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:23:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:29,433 INFO L225 Difference]: With dead ends: 991 [2021-07-09 17:23:29,433 INFO L226 Difference]: Without dead ends: 981 [2021-07-09 17:23:29,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:23:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-07-09 17:23:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 730. [2021-07-09 17:23:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.9753086419753085) internal successors, (2169), 729 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2169 transitions. [2021-07-09 17:23:29,442 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2169 transitions. Word has length 19 [2021-07-09 17:23:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:29,442 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2169 transitions. [2021-07-09 17:23:29,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2169 transitions. [2021-07-09 17:23:29,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:29,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:29,443 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:29,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5166,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:29,660 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1324838072, now seen corresponding path program 201 times [2021-07-09 17:23:29,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:29,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306353604] [2021-07-09 17:23:29,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:29,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:29,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306353604] [2021-07-09 17:23:29,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306353604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:29,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142839538] [2021-07-09 17:23:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:29,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:29,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:30,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:30,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:30,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:30,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:30,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142839538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:30,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840356004] [2021-07-09 17:23:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:30,253 INFO L87 Difference]: Start difference. First operand 730 states and 2169 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:30,638 INFO L93 Difference]: Finished difference Result 865 states and 2545 transitions. [2021-07-09 17:23:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:30,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:30,640 INFO L225 Difference]: With dead ends: 865 [2021-07-09 17:23:30,640 INFO L226 Difference]: Without dead ends: 849 [2021-07-09 17:23:30,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:23:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-07-09 17:23:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 821. [2021-07-09 17:23:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.0) internal successors, (2460), 820 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2460 transitions. [2021-07-09 17:23:30,649 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2460 transitions. Word has length 19 [2021-07-09 17:23:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:30,649 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2460 transitions. [2021-07-09 17:23:30,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2460 transitions. [2021-07-09 17:23:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:30,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:30,650 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:30,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5289 [2021-07-09 17:23:30,867 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:30,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash -465963542, now seen corresponding path program 202 times [2021-07-09 17:23:30,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:30,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990360793] [2021-07-09 17:23:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:30,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990360793] [2021-07-09 17:23:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990360793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64983796] [2021-07-09 17:23:30,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:30,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:30,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:30,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:31,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:31,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:31,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:31,517 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:31,518 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:31,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:31,627 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:31,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:31,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:31,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64983796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:31,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:31,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:31,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342909496] [2021-07-09 17:23:31,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:31,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:31,653 INFO L87 Difference]: Start difference. First operand 821 states and 2460 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:32,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:32,564 INFO L93 Difference]: Finished difference Result 986 states and 2831 transitions. [2021-07-09 17:23:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:23:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:32,566 INFO L225 Difference]: With dead ends: 986 [2021-07-09 17:23:32,566 INFO L226 Difference]: Without dead ends: 955 [2021-07-09 17:23:32,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 670.8ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:23:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-07-09 17:23:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 825. [2021-07-09 17:23:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.003640776699029) internal successors, (2475), 824 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2475 transitions. [2021-07-09 17:23:32,576 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2475 transitions. Word has length 19 [2021-07-09 17:23:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:32,576 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2475 transitions. [2021-07-09 17:23:32,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2475 transitions. [2021-07-09 17:23:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:32,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:32,577 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:32,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5359 [2021-07-09 17:23:32,793 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:32,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1244649766, now seen corresponding path program 203 times [2021-07-09 17:23:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:32,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615191128] [2021-07-09 17:23:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:32,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:32,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615191128] [2021-07-09 17:23:32,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615191128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:32,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954378310] [2021-07-09 17:23:32,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:32,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:32,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:32,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:33,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:33,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:33,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:33,513 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:33,514 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:33,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:33,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:33,727 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:33,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:33,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:33,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954378310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:33,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:33,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:33,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675174306] [2021-07-09 17:23:33,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:33,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:33,752 INFO L87 Difference]: Start difference. First operand 825 states and 2475 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:34,467 INFO L93 Difference]: Finished difference Result 1003 states and 2905 transitions. [2021-07-09 17:23:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:23:34,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:34,469 INFO L225 Difference]: With dead ends: 1003 [2021-07-09 17:23:34,469 INFO L226 Difference]: Without dead ends: 993 [2021-07-09 17:23:34,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:23:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-07-09 17:23:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 875. [2021-07-09 17:23:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.011441647597254) internal successors, (2632), 874 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2632 transitions. [2021-07-09 17:23:34,479 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2632 transitions. Word has length 19 [2021-07-09 17:23:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:34,479 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2632 transitions. [2021-07-09 17:23:34,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2632 transitions. [2021-07-09 17:23:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:34,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:34,480 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:34,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5466,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,696 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1560912534, now seen corresponding path program 204 times [2021-07-09 17:23:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:34,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146822416] [2021-07-09 17:23:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:34,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:34,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146822416] [2021-07-09 17:23:34,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146822416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:34,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506773069] [2021-07-09 17:23:34,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:34,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:34,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:34,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:35,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:35,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:35,341 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:35,341 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:35,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:35,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:35,480 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:35,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:35,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:35,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506773069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:35,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:35,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546663438] [2021-07-09 17:23:35,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:35,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:35,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:35,507 INFO L87 Difference]: Start difference. First operand 875 states and 2632 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:36,385 INFO L93 Difference]: Finished difference Result 1134 states and 3184 transitions. [2021-07-09 17:23:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:23:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:36,387 INFO L225 Difference]: With dead ends: 1134 [2021-07-09 17:23:36,387 INFO L226 Difference]: Without dead ends: 1100 [2021-07-09 17:23:36,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:23:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-07-09 17:23:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 884. [2021-07-09 17:23:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.0067950169875424) internal successors, (2655), 883 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2655 transitions. [2021-07-09 17:23:36,398 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2655 transitions. Word has length 19 [2021-07-09 17:23:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:36,398 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2655 transitions. [2021-07-09 17:23:36,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2655 transitions. [2021-07-09 17:23:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:36,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:36,399 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:36,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5579,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:36,616 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:36,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:36,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1660969382, now seen corresponding path program 205 times [2021-07-09 17:23:36,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:36,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131807238] [2021-07-09 17:23:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:36,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131807238] [2021-07-09 17:23:36,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131807238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932739809] [2021-07-09 17:23:36,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:36,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:36,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:37,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:37,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:37,259 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:37,260 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:37,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:37,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:37,481 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:37,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:37,482 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932739809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:37,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:37,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:37,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562233046] [2021-07-09 17:23:37,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:37,507 INFO L87 Difference]: Start difference. First operand 884 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:38,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:38,220 INFO L93 Difference]: Finished difference Result 1000 states and 2894 transitions. [2021-07-09 17:23:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:23:38,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:38,221 INFO L225 Difference]: With dead ends: 1000 [2021-07-09 17:23:38,221 INFO L226 Difference]: Without dead ends: 985 [2021-07-09 17:23:38,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:23:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-09 17:23:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 889. [2021-07-09 17:23:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.0033783783783785) internal successors, (2667), 888 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2667 transitions. [2021-07-09 17:23:38,232 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2667 transitions. Word has length 19 [2021-07-09 17:23:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:38,232 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2667 transitions. [2021-07-09 17:23:38,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2667 transitions. [2021-07-09 17:23:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:38,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:38,233 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:38,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5668,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,450 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1539906326, now seen corresponding path program 206 times [2021-07-09 17:23:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:38,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106589795] [2021-07-09 17:23:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:38,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:38,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106589795] [2021-07-09 17:23:38,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106589795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:38,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844959809] [2021-07-09 17:23:38,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:38,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:38,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:38,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:38,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:38,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:38,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:39,116 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:39,117 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:39,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:39,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:39,230 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:39,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:39,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:39,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844959809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:39,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:39,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:39,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368613895] [2021-07-09 17:23:39,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:39,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:39,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:39,256 INFO L87 Difference]: Start difference. First operand 889 states and 2667 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:39,945 INFO L93 Difference]: Finished difference Result 1045 states and 2995 transitions. [2021-07-09 17:23:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:39,947 INFO L225 Difference]: With dead ends: 1045 [2021-07-09 17:23:39,947 INFO L226 Difference]: Without dead ends: 1030 [2021-07-09 17:23:39,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 749.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:23:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-07-09 17:23:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 889. [2021-07-09 17:23:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-07-09 17:23:39,957 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-07-09 17:23:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:39,957 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-07-09 17:23:39,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-07-09 17:23:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:39,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:39,958 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:40,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:40,175 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:40,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1982805466, now seen corresponding path program 207 times [2021-07-09 17:23:40,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:40,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006509912] [2021-07-09 17:23:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:40,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:40,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006509912] [2021-07-09 17:23:40,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006509912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:40,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537267921] [2021-07-09 17:23:40,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:40,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:40,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:40,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:40,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:40,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:40,843 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:40,844 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:41,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:41,109 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:41,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:41,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:41,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537267921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:41,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:41,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:41,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158175267] [2021-07-09 17:23:41,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:41,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:41,137 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:41,734 INFO L93 Difference]: Finished difference Result 997 states and 2917 transitions. [2021-07-09 17:23:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:23:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:41,736 INFO L225 Difference]: With dead ends: 997 [2021-07-09 17:23:41,736 INFO L226 Difference]: Without dead ends: 992 [2021-07-09 17:23:41,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:23:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-07-09 17:23:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 889. [2021-07-09 17:23:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.009009009009009) internal successors, (2672), 888 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2672 transitions. [2021-07-09 17:23:41,746 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2672 transitions. Word has length 19 [2021-07-09 17:23:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:41,746 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2672 transitions. [2021-07-09 17:23:41,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2672 transitions. [2021-07-09 17:23:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:41,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:41,747 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:41,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:41,964 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:41,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2055345422, now seen corresponding path program 208 times [2021-07-09 17:23:41,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:41,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129986204] [2021-07-09 17:23:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:42,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:42,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129986204] [2021-07-09 17:23:42,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129986204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907448065] [2021-07-09 17:23:42,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:42,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:42,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:42,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:42,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:42,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:42,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:42,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:42,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:42,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:42,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907448065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:42,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:42,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:42,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215305300] [2021-07-09 17:23:42,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:42,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:42,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:42,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:42,574 INFO L87 Difference]: Start difference. First operand 889 states and 2672 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:43,049 INFO L93 Difference]: Finished difference Result 952 states and 2781 transitions. [2021-07-09 17:23:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:23:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:43,050 INFO L225 Difference]: With dead ends: 952 [2021-07-09 17:23:43,051 INFO L226 Difference]: Without dead ends: 924 [2021-07-09 17:23:43,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:23:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-07-09 17:23:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 889. [2021-07-09 17:23:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.001126126126126) internal successors, (2665), 888 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2665 transitions. [2021-07-09 17:23:43,061 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2665 transitions. Word has length 19 [2021-07-09 17:23:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:43,061 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2665 transitions. [2021-07-09 17:23:43,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2665 transitions. [2021-07-09 17:23:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:43,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:43,062 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:43,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5982,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:43,279 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:43,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1927527824, now seen corresponding path program 209 times [2021-07-09 17:23:43,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:43,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549608060] [2021-07-09 17:23:43,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:43,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:43,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549608060] [2021-07-09 17:23:43,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549608060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:43,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032715128] [2021-07-09 17:23:43,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:43,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:23:43,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:43,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:43,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:43,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:43,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:43,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:43,887 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:43,888 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:43,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:44,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:44,046 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:44,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:44,047 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:44,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032715128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:44,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:44,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:44,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039112377] [2021-07-09 17:23:44,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:44,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:44,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:44,072 INFO L87 Difference]: Start difference. First operand 889 states and 2665 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:45,004 INFO L93 Difference]: Finished difference Result 1134 states and 3182 transitions. [2021-07-09 17:23:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:23:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:45,006 INFO L225 Difference]: With dead ends: 1134 [2021-07-09 17:23:45,006 INFO L226 Difference]: Without dead ends: 1107 [2021-07-09 17:23:45,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:23:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-07-09 17:23:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 889. [2021-07-09 17:23:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.9977477477477477) internal successors, (2662), 888 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2662 transitions. [2021-07-09 17:23:45,018 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2662 transitions. Word has length 19 [2021-07-09 17:23:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:45,018 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 2662 transitions. [2021-07-09 17:23:45,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2662 transitions. [2021-07-09 17:23:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:45,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:45,020 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:45,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6028,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,238 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:45,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:45,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1273347884, now seen corresponding path program 210 times [2021-07-09 17:23:45,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:45,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41203890] [2021-07-09 17:23:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:45,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:45,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41203890] [2021-07-09 17:23:45,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41203890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:45,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501763905] [2021-07-09 17:23:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:45,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:45,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:45,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:45,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:45,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:45,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:45,902 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:45,903 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:45,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:46,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:46,265 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:46,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:46,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:46,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501763905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:46,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:46,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309972043] [2021-07-09 17:23:46,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:46,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:46,292 INFO L87 Difference]: Start difference. First operand 889 states and 2662 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:47,201 INFO L93 Difference]: Finished difference Result 1135 states and 3226 transitions. [2021-07-09 17:23:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:23:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:47,203 INFO L225 Difference]: With dead ends: 1135 [2021-07-09 17:23:47,203 INFO L226 Difference]: Without dead ends: 1106 [2021-07-09 17:23:47,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 900.9ms TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:23:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-09 17:23:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 867. [2021-07-09 17:23:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 2.9976905311778292) internal successors, (2596), 866 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2596 transitions. [2021-07-09 17:23:47,215 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2596 transitions. Word has length 19 [2021-07-09 17:23:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:47,215 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2596 transitions. [2021-07-09 17:23:47,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2596 transitions. [2021-07-09 17:23:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:47,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:47,216 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:47,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6118,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:47,433 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1716247024, now seen corresponding path program 211 times [2021-07-09 17:23:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568187909] [2021-07-09 17:23:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:47,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:47,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568187909] [2021-07-09 17:23:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568187909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101717064] [2021-07-09 17:23:47,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:47,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:47,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:47,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:47,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:48,079 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:48,080 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:48,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:48,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:48,221 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:48,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:48,222 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101717064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:48,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:48,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:48,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387136125] [2021-07-09 17:23:48,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:48,248 INFO L87 Difference]: Start difference. First operand 867 states and 2596 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:49,032 INFO L93 Difference]: Finished difference Result 1062 states and 3058 transitions. [2021-07-09 17:23:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:23:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:49,034 INFO L225 Difference]: With dead ends: 1062 [2021-07-09 17:23:49,034 INFO L226 Difference]: Without dead ends: 1052 [2021-07-09 17:23:49,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 760.0ms TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:23:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-07-09 17:23:49,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 869. [2021-07-09 17:23:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9976958525345623) internal successors, (2602), 868 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2602 transitions. [2021-07-09 17:23:49,044 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2602 transitions. Word has length 19 [2021-07-09 17:23:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:49,044 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2602 transitions. [2021-07-09 17:23:49,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2602 transitions. [2021-07-09 17:23:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:49,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:49,045 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:49,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6256 [2021-07-09 17:23:49,262 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash 789143798, now seen corresponding path program 212 times [2021-07-09 17:23:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:49,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572768149] [2021-07-09 17:23:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:49,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:49,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572768149] [2021-07-09 17:23:49,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572768149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:49,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004135869] [2021-07-09 17:23:49,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:49,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:49,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:49,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:49,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:49,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:49,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:49,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:49,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:49,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:49,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:49,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004135869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:49,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:49,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:23:49,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420994786] [2021-07-09 17:23:49,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:23:49,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:49,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:23:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:23:49,887 INFO L87 Difference]: Start difference. First operand 869 states and 2602 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:50,187 INFO L93 Difference]: Finished difference Result 915 states and 2683 transitions. [2021-07-09 17:23:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:23:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:23:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:50,189 INFO L225 Difference]: With dead ends: 915 [2021-07-09 17:23:50,189 INFO L226 Difference]: Without dead ends: 897 [2021-07-09 17:23:50,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:23:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-09 17:23:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 869. [2021-07-09 17:23:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.9953917050691246) internal successors, (2600), 868 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2600 transitions. [2021-07-09 17:23:50,199 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2600 transitions. Word has length 19 [2021-07-09 17:23:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:50,199 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2600 transitions. [2021-07-09 17:23:50,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:23:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2600 transitions. [2021-07-09 17:23:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:50,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:50,200 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:50,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6357,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:50,417 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 28116982, now seen corresponding path program 213 times [2021-07-09 17:23:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:50,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717799287] [2021-07-09 17:23:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:50,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:50,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717799287] [2021-07-09 17:23:50,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717799287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:50,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221968992] [2021-07-09 17:23:50,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:50,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:23:50,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:50,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:50,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:50,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:50,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:50,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:51,112 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:51,113 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:51,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:51,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:51,705 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:51,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:51,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:51,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221968992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:51,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:51,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:23:51,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499951489] [2021-07-09 17:23:51,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:23:51,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:23:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:23:51,732 INFO L87 Difference]: Start difference. First operand 869 states and 2600 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:52,711 INFO L93 Difference]: Finished difference Result 1107 states and 3182 transitions. [2021-07-09 17:23:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:23:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:23:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:52,713 INFO L225 Difference]: With dead ends: 1107 [2021-07-09 17:23:52,713 INFO L226 Difference]: Without dead ends: 1097 [2021-07-09 17:23:52,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 958.6ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:23:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-07-09 17:23:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 896. [2021-07-09 17:23:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.9966480446927375) internal successors, (2682), 895 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2682 transitions. [2021-07-09 17:23:52,748 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2682 transitions. Word has length 19 [2021-07-09 17:23:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:52,748 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2682 transitions. [2021-07-09 17:23:52,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:23:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2682 transitions. [2021-07-09 17:23:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:52,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:52,749 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:52,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6420 [2021-07-09 17:23:52,952 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:52,953 INFO L82 PathProgramCache]: Analyzing trace with hash 49617522, now seen corresponding path program 214 times [2021-07-09 17:23:52,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:52,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493104717] [2021-07-09 17:23:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:53,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493104717] [2021-07-09 17:23:53,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493104717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317938808] [2021-07-09 17:23:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:53,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:23:53,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:53,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:53,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:53,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:53,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:53,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:53,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:23:53,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-09 17:23:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:53,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317938808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:53,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:53,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:53,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130160857] [2021-07-09 17:23:53,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:53,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:53,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:53,435 INFO L87 Difference]: Start difference. First operand 896 states and 2682 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:53,767 INFO L93 Difference]: Finished difference Result 1009 states and 2994 transitions. [2021-07-09 17:23:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:23:53,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:53,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:53,769 INFO L225 Difference]: With dead ends: 1009 [2021-07-09 17:23:53,769 INFO L226 Difference]: Without dead ends: 995 [2021-07-09 17:23:53,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:23:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-09 17:23:53,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 972. [2021-07-09 17:23:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.015447991761071) internal successors, (2928), 971 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 2928 transitions. [2021-07-09 17:23:53,780 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 2928 transitions. Word has length 19 [2021-07-09 17:23:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:53,781 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 2928 transitions. [2021-07-09 17:23:53,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 2928 transitions. [2021-07-09 17:23:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:53,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:53,782 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:53,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6583 [2021-07-09 17:23:53,998 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:53,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:53,999 INFO L82 PathProgramCache]: Analyzing trace with hash 908492052, now seen corresponding path program 215 times [2021-07-09 17:23:53,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:53,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935035177] [2021-07-09 17:23:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:54,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935035177] [2021-07-09 17:23:54,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935035177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:54,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841465729] [2021-07-09 17:23:54,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:54,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:23:54,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:54,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:54,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:54,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:54,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:54,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:54,624 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:54,624 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:54,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:54,839 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:54,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:54,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:54,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841465729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:54,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:54,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:54,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877547985] [2021-07-09 17:23:54,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:54,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:54,864 INFO L87 Difference]: Start difference. First operand 972 states and 2928 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:55,787 INFO L93 Difference]: Finished difference Result 1109 states and 3246 transitions. [2021-07-09 17:23:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:23:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:55,790 INFO L225 Difference]: With dead ends: 1109 [2021-07-09 17:23:55,790 INFO L226 Difference]: Without dead ends: 1099 [2021-07-09 17:23:55,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:23:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-09 17:23:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 976. [2021-07-09 17:23:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.0194871794871796) internal successors, (2944), 975 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2944 transitions. [2021-07-09 17:23:55,802 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2944 transitions. Word has length 19 [2021-07-09 17:23:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:55,802 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 2944 transitions. [2021-07-09 17:23:55,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2944 transitions. [2021-07-09 17:23:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:55,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:55,804 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:56,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6632,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:56,017 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1675861936, now seen corresponding path program 216 times [2021-07-09 17:23:56,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:56,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863902826] [2021-07-09 17:23:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:56,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:56,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863902826] [2021-07-09 17:23:56,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863902826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:56,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429395111] [2021-07-09 17:23:56,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:56,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:23:56,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:56,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:56,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:56,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:56,598 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:56,598 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:56,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:56,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:56,724 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:56,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:56,725 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:56,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429395111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:56,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:56,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23570981] [2021-07-09 17:23:56,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:56,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:56,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:56,749 INFO L87 Difference]: Start difference. First operand 976 states and 2944 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:57,467 INFO L93 Difference]: Finished difference Result 1144 states and 3334 transitions. [2021-07-09 17:23:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:23:57,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:57,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:57,469 INFO L225 Difference]: With dead ends: 1144 [2021-07-09 17:23:57,469 INFO L226 Difference]: Without dead ends: 1134 [2021-07-09 17:23:57,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:23:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-07-09 17:23:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1010. [2021-07-09 17:23:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.0297324083250743) internal successors, (3057), 1009 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3057 transitions. [2021-07-09 17:23:57,481 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3057 transitions. Word has length 19 [2021-07-09 17:23:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:57,481 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 3057 transitions. [2021-07-09 17:23:57,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3057 transitions. [2021-07-09 17:23:57,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:57,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:57,483 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:57,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6761,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,700 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -186456940, now seen corresponding path program 217 times [2021-07-09 17:23:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:57,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065928265] [2021-07-09 17:23:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:23:57,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:57,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065928265] [2021-07-09 17:23:57,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065928265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:57,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496499492] [2021-07-09 17:23:57,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:57,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:57,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:58,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:58,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:23:58,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:23:58,338 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:23:58,339 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:23:58,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:23:58,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:23:58,514 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:23:58,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:23:58,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:23:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:58,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496499492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:58,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:23:58,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:23:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591106725] [2021-07-09 17:23:58,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:23:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:23:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:23:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:23:58,541 INFO L87 Difference]: Start difference. First operand 1010 states and 3057 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:23:59,318 INFO L93 Difference]: Finished difference Result 1206 states and 3490 transitions. [2021-07-09 17:23:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:23:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 19 [2021-07-09 17:23:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:23:59,321 INFO L225 Difference]: With dead ends: 1206 [2021-07-09 17:23:59,321 INFO L226 Difference]: Without dead ends: 1191 [2021-07-09 17:23:59,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:23:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-07-09 17:23:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1047. [2021-07-09 17:23:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.0315487571701722) internal successors, (3171), 1046 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:23:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3171 transitions. [2021-07-09 17:23:59,334 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3171 transitions. Word has length 19 [2021-07-09 17:23:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:23:59,335 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3171 transitions. [2021-07-09 17:23:59,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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) [2021-07-09 17:23:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3171 transitions. [2021-07-09 17:23:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:23:59,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:23:59,336 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:23:59,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6856 [2021-07-09 17:23:59,541 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:23:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:23:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1259542320, now seen corresponding path program 218 times [2021-07-09 17:23:59,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:23:59,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063519600] [2021-07-09 17:23:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:23:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:23:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:23:59,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:23:59,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063519600] [2021-07-09 17:23:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063519600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:23:59,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715913485] [2021-07-09 17:23:59,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:23:59,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:23:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:23:59,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:23:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:23:59,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:23:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:24:00,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:00,116 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:24:00,116 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:24:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:24:00,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:24:00,280 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:24:00,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:00,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:24:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:00,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715913485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:00,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:00,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:00,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105938629] [2021-07-09 17:24:00,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:00,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:00,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:00,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:00,305 INFO L87 Difference]: Start difference. First operand 1047 states and 3171 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:24:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:01,336 INFO L93 Difference]: Finished difference Result 1314 states and 3702 transitions. [2021-07-09 17:24:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:24:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:24:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:01,339 INFO L225 Difference]: With dead ends: 1314 [2021-07-09 17:24:01,339 INFO L226 Difference]: Without dead ends: 1289 [2021-07-09 17:24:01,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:24:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-07-09 17:24:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1050. [2021-07-09 17:24:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.0276453765490943) internal successors, (3176), 1049 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3176 transitions. [2021-07-09 17:24:01,352 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3176 transitions. Word has length 19 [2021-07-09 17:24:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:01,352 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 3176 transitions. [2021-07-09 17:24:01,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:24:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3176 transitions. [2021-07-09 17:24:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:01,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:01,354 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:01,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6976,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:01,570 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash -165450732, now seen corresponding path program 219 times [2021-07-09 17:24:01,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:01,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196161512] [2021-07-09 17:24:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:01,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196161512] [2021-07-09 17:24:01,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196161512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:01,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676034135] [2021-07-09 17:24:01,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:01,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:24:01,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:01,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:24:01,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:01,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:01,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:24:02,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:02,175 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:24:02,175 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:24:02,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:24:02,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:24:02,516 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:24:02,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:02,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:24:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676034135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:02,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:02,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:02,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929458993] [2021-07-09 17:24:02,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:02,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:02,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:02,562 INFO L87 Difference]: Start difference. First operand 1050 states and 3176 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:24:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:03,369 INFO L93 Difference]: Finished difference Result 1208 states and 3517 transitions. [2021-07-09 17:24:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:24:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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 19 [2021-07-09 17:24:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:03,372 INFO L225 Difference]: With dead ends: 1208 [2021-07-09 17:24:03,372 INFO L226 Difference]: Without dead ends: 1193 [2021-07-09 17:24:03,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:24:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-07-09 17:24:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1057. [2021-07-09 17:24:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 3.024621212121212) internal successors, (3194), 1056 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3194 transitions. [2021-07-09 17:24:03,385 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3194 transitions. Word has length 19 [2021-07-09 17:24:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:03,385 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 3194 transitions. [2021-07-09 17:24:03,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 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) [2021-07-09 17:24:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3194 transitions. [2021-07-09 17:24:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:03,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:03,386 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:03,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7085 [2021-07-09 17:24:03,602 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:03,603 INFO L82 PathProgramCache]: Analyzing trace with hash -608349872, now seen corresponding path program 220 times [2021-07-09 17:24:03,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:03,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828304138] [2021-07-09 17:24:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:03,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:03,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828304138] [2021-07-09 17:24:03,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828304138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:03,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696947649] [2021-07-09 17:24:03,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:03,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:03,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:24:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:03,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:24:04,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:04,485 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:24:04,486 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:24:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:24:04,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:24:04,903 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:24:04,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:04,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:24:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:04,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696947649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:04,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:04,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:24:04,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900560578] [2021-07-09 17:24:04,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:24:04,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:04,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:24:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:04,929 INFO L87 Difference]: Start difference. First operand 1057 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:24:05,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:05,830 INFO L93 Difference]: Finished difference Result 1268 states and 3657 transitions. [2021-07-09 17:24:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:24:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:05,832 INFO L225 Difference]: With dead ends: 1268 [2021-07-09 17:24:05,832 INFO L226 Difference]: Without dead ends: 1253 [2021-07-09 17:24:05,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:24:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-07-09 17:24:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1056. [2021-07-09 17:24:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 3.0274881516587677) internal successors, (3194), 1055 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3194 transitions. [2021-07-09 17:24:05,847 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3194 transitions. Word has length 19 [2021-07-09 17:24:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:05,847 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 3194 transitions. [2021-07-09 17:24:05,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:24:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3194 transitions. [2021-07-09 17:24:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:24:05,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:05,848 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:06,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7205,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:06,065 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:06,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1453321324, now seen corresponding path program 221 times [2021-07-09 17:24:06,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:06,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628579302] [2021-07-09 17:24:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:06,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628579302] [2021-07-09 17:24:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628579302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786072262] [2021-07-09 17:24:06,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:06,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:24:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:06,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 17:24:06,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:06,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:06,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-09 17:24:06,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:06,724 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-07-09 17:24:06,725 INFO L354 Elim1Store]: treesize reduction 24, result has 85.8 percent of original size [2021-07-09 17:24:06,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 169 [2021-07-09 17:24:06,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:24:06,928 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:24:06,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:24:06,929 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:74, output treesize:15 [2021-07-09 17:24:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:06,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786072262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:06,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:06,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:24:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304475566] [2021-07-09 17:24:06,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:24:06,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:24:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:06,978 INFO L87 Difference]: Start difference. First operand 1056 states and 3194 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:24:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:07,552 INFO L93 Difference]: Finished difference Result 1209 states and 3557 transitions. [2021-07-09 17:24:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:24:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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 19 [2021-07-09 17:24:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:07,554 INFO L225 Difference]: With dead ends: 1209 [2021-07-09 17:24:07,554 INFO L226 Difference]: Without dead ends: 1204 [2021-07-09 17:24:07,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 665.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:24:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-09 17:24:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1058. [2021-07-09 17:24:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.024597918637654) internal successors, (3197), 1057 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3197 transitions. [2021-07-09 17:24:07,566 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3197 transitions. Word has length 19 [2021-07-09 17:24:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:07,566 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 3197 transitions. [2021-07-09 17:24:07,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 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) [2021-07-09 17:24:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3197 transitions. [2021-07-09 17:24:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:07,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:07,568 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:07,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7448,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:07,781 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2016450674, now seen corresponding path program 222 times [2021-07-09 17:24:07,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:07,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671099488] [2021-07-09 17:24:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:07,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671099488] [2021-07-09 17:24:07,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671099488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:07,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866396656] [2021-07-09 17:24:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:07,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:07,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:08,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:08,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:08,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:08,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:08,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:08,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:08,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866396656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:08,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:08,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:24:08,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104054421] [2021-07-09 17:24:08,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:24:08,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:24:08,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:08,770 INFO L87 Difference]: Start difference. First operand 1058 states and 3197 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:09,133 INFO L93 Difference]: Finished difference Result 1126 states and 3328 transitions. [2021-07-09 17:24:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:09,136 INFO L225 Difference]: With dead ends: 1126 [2021-07-09 17:24:09,136 INFO L226 Difference]: Without dead ends: 1113 [2021-07-09 17:24:09,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:24:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-09 17:24:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1063. [2021-07-09 17:24:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.019774011299435) internal successors, (3207), 1062 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3207 transitions. [2021-07-09 17:24:09,151 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3207 transitions. Word has length 20 [2021-07-09 17:24:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:09,151 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3207 transitions. [2021-07-09 17:24:09,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3207 transitions. [2021-07-09 17:24:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:09,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:09,152 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:09,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7560 [2021-07-09 17:24:09,369 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2008627890, now seen corresponding path program 223 times [2021-07-09 17:24:09,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:09,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360012111] [2021-07-09 17:24:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:09,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:09,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360012111] [2021-07-09 17:24:09,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360012111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:09,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491218249] [2021-07-09 17:24:09,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:09,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:09,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:10,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:10,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:10,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:10,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:10,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491218249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:10,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:10,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211413736] [2021-07-09 17:24:10,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:10,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:10,101 INFO L87 Difference]: Start difference. First operand 1063 states and 3207 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:10,451 INFO L93 Difference]: Finished difference Result 1193 states and 3423 transitions. [2021-07-09 17:24:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:10,453 INFO L225 Difference]: With dead ends: 1193 [2021-07-09 17:24:10,453 INFO L226 Difference]: Without dead ends: 1184 [2021-07-09 17:24:10,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-07-09 17:24:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1065. [2021-07-09 17:24:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-07-09 17:24:10,466 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-07-09 17:24:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:10,466 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-07-09 17:24:10,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-07-09 17:24:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:10,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:10,467 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:10,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7663 [2021-07-09 17:24:10,683 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:10,683 INFO L82 PathProgramCache]: Analyzing trace with hash 560859948, now seen corresponding path program 224 times [2021-07-09 17:24:10,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:10,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591676943] [2021-07-09 17:24:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:10,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591676943] [2021-07-09 17:24:10,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591676943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197803637] [2021-07-09 17:24:10,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:10,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:10,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:11,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:11,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:12,405 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 229 [2021-07-09 17:24:12,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:12,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:12,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:12,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197803637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:12,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:12,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:12,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861138611] [2021-07-09 17:24:12,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:12,580 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,081 INFO L93 Difference]: Finished difference Result 1199 states and 3459 transitions. [2021-07-09 17:24:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:13,084 INFO L225 Difference]: With dead ends: 1199 [2021-07-09 17:24:13,084 INFO L226 Difference]: Without dead ends: 1194 [2021-07-09 17:24:13,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-07-09 17:24:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1065. [2021-07-09 17:24:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.0197368421052633) internal successors, (3213), 1064 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3213 transitions. [2021-07-09 17:24:13,096 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3213 transitions. Word has length 20 [2021-07-09 17:24:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,096 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 3213 transitions. [2021-07-09 17:24:13,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3213 transitions. [2021-07-09 17:24:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:13,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,098 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:13,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7760 [2021-07-09 17:24:13,314 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:13,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1075164181, now seen corresponding path program 225 times [2021-07-09 17:24:13,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:13,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001207274] [2021-07-09 17:24:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:13,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001207274] [2021-07-09 17:24:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001207274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644772468] [2021-07-09 17:24:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:13,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:24:13,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:13,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644772468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:13,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:24:13,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96780183] [2021-07-09 17:24:13,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:24:13,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:24:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:24:13,416 INFO L87 Difference]: Start difference. First operand 1065 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:13,466 INFO L93 Difference]: Finished difference Result 1365 states and 3760 transitions. [2021-07-09 17:24:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:24:13,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:13,468 INFO L225 Difference]: With dead ends: 1365 [2021-07-09 17:24:13,468 INFO L226 Difference]: Without dead ends: 1365 [2021-07-09 17:24:13,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-07-09 17:24:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1073. [2021-07-09 17:24:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0261194029850746) internal successors, (3244), 1072 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3244 transitions. [2021-07-09 17:24:13,481 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3244 transitions. Word has length 20 [2021-07-09 17:24:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:13,481 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3244 transitions. [2021-07-09 17:24:13,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:13,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3244 transitions. [2021-07-09 17:24:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:13,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:13,482 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:13,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8018,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:13,699 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash 421097848, now seen corresponding path program 226 times [2021-07-09 17:24:13,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:13,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971740939] [2021-07-09 17:24:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:13,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971740939] [2021-07-09 17:24:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971740939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735909952] [2021-07-09 17:24:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:13,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:13,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:13,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:14,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:14,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:14,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:14,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:14,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:14,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:14,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735909952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:14,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:14,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:14,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261924156] [2021-07-09 17:24:14,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:14,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:14,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:14,528 INFO L87 Difference]: Start difference. First operand 1073 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:14,834 INFO L93 Difference]: Finished difference Result 1199 states and 3479 transitions. [2021-07-09 17:24:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:14,837 INFO L225 Difference]: With dead ends: 1199 [2021-07-09 17:24:14,837 INFO L226 Difference]: Without dead ends: 1194 [2021-07-09 17:24:14,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-07-09 17:24:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1079. [2021-07-09 17:24:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.031539888682746) internal successors, (3268), 1078 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3268 transitions. [2021-07-09 17:24:14,852 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3268 transitions. Word has length 20 [2021-07-09 17:24:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:14,852 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3268 transitions. [2021-07-09 17:24:14,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3268 transitions. [2021-07-09 17:24:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:14,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:14,854 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:15,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8019 [2021-07-09 17:24:15,069 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1304381610, now seen corresponding path program 227 times [2021-07-09 17:24:15,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:15,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615714584] [2021-07-09 17:24:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:15,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:15,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615714584] [2021-07-09 17:24:15,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615714584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:15,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411286193] [2021-07-09 17:24:15,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:15,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:15,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:15,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:15,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:15,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:15,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:15,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:15,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411286193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:15,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:15,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:15,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963726863] [2021-07-09 17:24:15,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:15,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:15,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:15,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:15,975 INFO L87 Difference]: Start difference. First operand 1079 states and 3268 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:16,353 INFO L93 Difference]: Finished difference Result 1210 states and 3510 transitions. [2021-07-09 17:24:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:24:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:16,355 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:24:16,355 INFO L226 Difference]: Without dead ends: 1201 [2021-07-09 17:24:16,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:24:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-09 17:24:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1081. [2021-07-09 17:24:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 3.0296296296296297) internal successors, (3272), 1080 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 3272 transitions. [2021-07-09 17:24:16,368 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 3272 transitions. Word has length 20 [2021-07-09 17:24:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:16,369 INFO L482 AbstractCegarLoop]: Abstraction has 1081 states and 3272 transitions. [2021-07-09 17:24:16,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 3272 transitions. [2021-07-09 17:24:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:16,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:16,370 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:16,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8107,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:16,586 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash 185023386, now seen corresponding path program 228 times [2021-07-09 17:24:16,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:16,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50045147] [2021-07-09 17:24:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:16,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:16,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50045147] [2021-07-09 17:24:16,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50045147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:16,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887454969] [2021-07-09 17:24:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:16,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:16,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:16,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:16,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:16,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:17,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:17,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:17,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:17,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887454969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:17,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:17,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62844202] [2021-07-09 17:24:17,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:17,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:17,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:17,452 INFO L87 Difference]: Start difference. First operand 1081 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:17,689 INFO L93 Difference]: Finished difference Result 1169 states and 3442 transitions. [2021-07-09 17:24:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:17,691 INFO L225 Difference]: With dead ends: 1169 [2021-07-09 17:24:17,691 INFO L226 Difference]: Without dead ends: 1164 [2021-07-09 17:24:17,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-09 17:24:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1082. [2021-07-09 17:24:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 3.0296022201665127) internal successors, (3275), 1081 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3275 transitions. [2021-07-09 17:24:17,704 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3275 transitions. Word has length 20 [2021-07-09 17:24:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:17,704 INFO L482 AbstractCegarLoop]: Abstraction has 1082 states and 3275 transitions. [2021-07-09 17:24:17,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3275 transitions. [2021-07-09 17:24:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:17,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:17,705 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:17,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8219,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:17,912 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash -706298245, now seen corresponding path program 229 times [2021-07-09 17:24:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:17,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430455100] [2021-07-09 17:24:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:17,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:17,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430455100] [2021-07-09 17:24:17,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430455100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:17,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864646012] [2021-07-09 17:24:17,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:17,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864646012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:18,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:24:18,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853451672] [2021-07-09 17:24:18,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:18,012 INFO L87 Difference]: Start difference. First operand 1082 states and 3275 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:18,086 INFO L93 Difference]: Finished difference Result 1465 states and 4016 transitions. [2021-07-09 17:24:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:18,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:18,089 INFO L225 Difference]: With dead ends: 1465 [2021-07-09 17:24:18,089 INFO L226 Difference]: Without dead ends: 1465 [2021-07-09 17:24:18,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-07-09 17:24:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1072. [2021-07-09 17:24:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 3.022408963585434) internal successors, (3237), 1071 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3237 transitions. [2021-07-09 17:24:18,103 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3237 transitions. Word has length 20 [2021-07-09 17:24:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:18,103 INFO L482 AbstractCegarLoop]: Abstraction has 1072 states and 3237 transitions. [2021-07-09 17:24:18,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:18,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3237 transitions. [2021-07-09 17:24:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:18,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:18,105 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:18,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8341,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:18,322 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1248078420, now seen corresponding path program 230 times [2021-07-09 17:24:18,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:18,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846870837] [2021-07-09 17:24:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:18,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846870837] [2021-07-09 17:24:18,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846870837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101506728] [2021-07-09 17:24:18,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:18,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:18,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:18,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:18,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:18,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:18,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:18,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:18,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:18,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101506728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:18,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:18,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:24:18,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709523735] [2021-07-09 17:24:18,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:24:18,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:24:18,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:18,940 INFO L87 Difference]: Start difference. First operand 1072 states and 3237 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:19,260 INFO L93 Difference]: Finished difference Result 1095 states and 3276 transitions. [2021-07-09 17:24:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 20 [2021-07-09 17:24:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:19,262 INFO L225 Difference]: With dead ends: 1095 [2021-07-09 17:24:19,262 INFO L226 Difference]: Without dead ends: 1080 [2021-07-09 17:24:19,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:24:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-07-09 17:24:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1069. [2021-07-09 17:24:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.019662921348315) internal successors, (3225), 1068 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3225 transitions. [2021-07-09 17:24:19,275 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3225 transitions. Word has length 20 [2021-07-09 17:24:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:19,275 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3225 transitions. [2021-07-09 17:24:19,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3225 transitions. [2021-07-09 17:24:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:19,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:19,276 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:19,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-07-09 17:24:19,493 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1296543798, now seen corresponding path program 231 times [2021-07-09 17:24:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:19,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628401690] [2021-07-09 17:24:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:19,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628401690] [2021-07-09 17:24:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628401690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830109395] [2021-07-09 17:24:19,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:19,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:24:19,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:19,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:19,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:19,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:21,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:21,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:21,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:21,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:21,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830109395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:21,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:21,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:21,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232843174] [2021-07-09 17:24:21,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:21,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:21,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:21,385 INFO L87 Difference]: Start difference. First operand 1069 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:21,889 INFO L93 Difference]: Finished difference Result 1190 states and 3432 transitions. [2021-07-09 17:24:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:21,892 INFO L225 Difference]: With dead ends: 1190 [2021-07-09 17:24:21,892 INFO L226 Difference]: Without dead ends: 1167 [2021-07-09 17:24:21,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-09 17:24:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1068. [2021-07-09 17:24:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.0159325210871604) internal successors, (3218), 1067 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3218 transitions. [2021-07-09 17:24:21,904 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3218 transitions. Word has length 20 [2021-07-09 17:24:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:21,904 INFO L482 AbstractCegarLoop]: Abstraction has 1068 states and 3218 transitions. [2021-07-09 17:24:21,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:21,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3218 transitions. [2021-07-09 17:24:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:21,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:21,906 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:22,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8416,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,114 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1566815602, now seen corresponding path program 232 times [2021-07-09 17:24:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:22,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019161415] [2021-07-09 17:24:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:22,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019161415] [2021-07-09 17:24:22,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019161415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296154220] [2021-07-09 17:24:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:22,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:22,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:22,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:22,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:22,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:22,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:22,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:22,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:22,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296154220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:22,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:22,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:22,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464290576] [2021-07-09 17:24:22,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:22,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:22,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:22,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:22,893 INFO L87 Difference]: Start difference. First operand 1068 states and 3218 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:23,220 INFO L93 Difference]: Finished difference Result 1170 states and 3412 transitions. [2021-07-09 17:24:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:23,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:23,223 INFO L225 Difference]: With dead ends: 1170 [2021-07-09 17:24:23,223 INFO L226 Difference]: Without dead ends: 1161 [2021-07-09 17:24:23,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-09 17:24:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1073. [2021-07-09 17:24:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-07-09 17:24:23,236 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-07-09 17:24:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:23,236 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-07-09 17:24:23,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-07-09 17:24:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:23,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:23,237 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:23,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8711,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,438 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:23,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1002672236, now seen corresponding path program 233 times [2021-07-09 17:24:23,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:23,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163819477] [2021-07-09 17:24:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:23,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163819477] [2021-07-09 17:24:23,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163819477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625054362] [2021-07-09 17:24:23,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:23,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:23,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:23,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:23,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:24,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:24,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:24,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:24,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:24,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625054362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:24,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:24,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:24,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103722257] [2021-07-09 17:24:24,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:24,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:24,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:24,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:24,419 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:24,830 INFO L93 Difference]: Finished difference Result 1158 states and 3390 transitions. [2021-07-09 17:24:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:24,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:24,832 INFO L225 Difference]: With dead ends: 1158 [2021-07-09 17:24:24,832 INFO L226 Difference]: Without dead ends: 1153 [2021-07-09 17:24:24,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-07-09 17:24:24,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1073. [2021-07-09 17:24:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0167910447761193) internal successors, (3234), 1072 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3234 transitions. [2021-07-09 17:24:24,845 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3234 transitions. Word has length 20 [2021-07-09 17:24:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:24,845 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3234 transitions. [2021-07-09 17:24:24,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3234 transitions. [2021-07-09 17:24:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:24,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:24,846 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:25,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8801,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:25,064 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1802890064, now seen corresponding path program 234 times [2021-07-09 17:24:25,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:25,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013530412] [2021-07-09 17:24:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:25,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:25,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013530412] [2021-07-09 17:24:25,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013530412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:25,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170584669] [2021-07-09 17:24:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:25,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:25,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:25,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:26,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:26,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:26,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:26,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:26,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170584669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:26,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:26,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:26,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114846087] [2021-07-09 17:24:26,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:26,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:26,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:26,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:26,275 INFO L87 Difference]: Start difference. First operand 1073 states and 3234 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:26,838 INFO L93 Difference]: Finished difference Result 1194 states and 3443 transitions. [2021-07-09 17:24:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:24:26,839 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:26,840 INFO L225 Difference]: With dead ends: 1194 [2021-07-09 17:24:26,840 INFO L226 Difference]: Without dead ends: 1177 [2021-07-09 17:24:26,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:24:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-07-09 17:24:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1073. [2021-07-09 17:24:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0065298507462686) internal successors, (3223), 1072 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3223 transitions. [2021-07-09 17:24:26,853 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3223 transitions. Word has length 20 [2021-07-09 17:24:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:26,853 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3223 transitions. [2021-07-09 17:24:26,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3223 transitions. [2021-07-09 17:24:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:26,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:26,854 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:27,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8896 [2021-07-09 17:24:27,071 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1600755601, now seen corresponding path program 235 times [2021-07-09 17:24:27,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:27,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798541357] [2021-07-09 17:24:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:27,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798541357] [2021-07-09 17:24:27,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798541357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932921262] [2021-07-09 17:24:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932921262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:27,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:27,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133472929] [2021-07-09 17:24:27,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:27,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:27,177 INFO L87 Difference]: Start difference. First operand 1073 states and 3223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:27,255 INFO L93 Difference]: Finished difference Result 1408 states and 3883 transitions. [2021-07-09 17:24:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:27,257 INFO L225 Difference]: With dead ends: 1408 [2021-07-09 17:24:27,257 INFO L226 Difference]: Without dead ends: 1408 [2021-07-09 17:24:27,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:24:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-07-09 17:24:27,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1089. [2021-07-09 17:24:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 3.011029411764706) internal successors, (3276), 1088 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 3276 transitions. [2021-07-09 17:24:27,270 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 3276 transitions. Word has length 20 [2021-07-09 17:24:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:27,270 INFO L482 AbstractCegarLoop]: Abstraction has 1089 states and 3276 transitions. [2021-07-09 17:24:27,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:27,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 3276 transitions. [2021-07-09 17:24:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:27,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:27,272 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:27,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9060,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,485 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1418991852, now seen corresponding path program 236 times [2021-07-09 17:24:27,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:27,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261020150] [2021-07-09 17:24:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:27,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261020150] [2021-07-09 17:24:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261020150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764885242] [2021-07-09 17:24:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:27,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:27,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:27,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:28,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:28,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:28,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:28,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:28,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764885242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:28,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:28,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:28,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819547430] [2021-07-09 17:24:28,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:28,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:28,430 INFO L87 Difference]: Start difference. First operand 1089 states and 3276 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:28,723 INFO L93 Difference]: Finished difference Result 1220 states and 3550 transitions. [2021-07-09 17:24:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:28,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:28,725 INFO L225 Difference]: With dead ends: 1220 [2021-07-09 17:24:28,725 INFO L226 Difference]: Without dead ends: 1215 [2021-07-09 17:24:28,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-07-09 17:24:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1090. [2021-07-09 17:24:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.0110192837465566) internal successors, (3279), 1089 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3279 transitions. [2021-07-09 17:24:28,738 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3279 transitions. Word has length 20 [2021-07-09 17:24:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:28,738 INFO L482 AbstractCegarLoop]: Abstraction has 1090 states and 3279 transitions. [2021-07-09 17:24:28,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3279 transitions. [2021-07-09 17:24:28,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:28,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:28,739 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:28,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9061,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:28,956 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:28,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2138611179, now seen corresponding path program 237 times [2021-07-09 17:24:28,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:28,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481912396] [2021-07-09 17:24:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:29,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481912396] [2021-07-09 17:24:29,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481912396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377612018] [2021-07-09 17:24:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:24:29,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:29,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:29,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377612018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:29,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:29,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364770353] [2021-07-09 17:24:29,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:29,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:29,087 INFO L87 Difference]: Start difference. First operand 1090 states and 3279 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:29,218 INFO L93 Difference]: Finished difference Result 1834 states and 5241 transitions. [2021-07-09 17:24:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:24:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:29,232 INFO L225 Difference]: With dead ends: 1834 [2021-07-09 17:24:29,232 INFO L226 Difference]: Without dead ends: 1834 [2021-07-09 17:24:29,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-07-09 17:24:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1516. [2021-07-09 17:24:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.0613861386138614) internal successors, (4638), 1515 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4638 transitions. [2021-07-09 17:24:29,271 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4638 transitions. Word has length 20 [2021-07-09 17:24:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:29,271 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 4638 transitions. [2021-07-09 17:24:29,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4638 transitions. [2021-07-09 17:24:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:29,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:29,279 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:29,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9186,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,479 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 67979132, now seen corresponding path program 238 times [2021-07-09 17:24:29,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:29,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151243550] [2021-07-09 17:24:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:24:29,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:29,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151243550] [2021-07-09 17:24:29,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151243550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:29,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003916310] [2021-07-09 17:24:29,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:29,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:29,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:29,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:29,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:30,810 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 234 [2021-07-09 17:24:31,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:31,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:31,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:31,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:31,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003916310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:31,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 17:24:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070829684] [2021-07-09 17:24:31,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:24:31,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:24:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:31,206 INFO L87 Difference]: Start difference. First operand 1516 states and 4638 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:31,558 INFO L93 Difference]: Finished difference Result 1539 states and 4677 transitions. [2021-07-09 17:24:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:24:31,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 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 20 [2021-07-09 17:24:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:31,561 INFO L225 Difference]: With dead ends: 1539 [2021-07-09 17:24:31,561 INFO L226 Difference]: Without dead ends: 1524 [2021-07-09 17:24:31,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-07-09 17:24:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1514. [2021-07-09 17:24:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.060806345009914) internal successors, (4631), 1513 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4631 transitions. [2021-07-09 17:24:31,581 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4631 transitions. Word has length 20 [2021-07-09 17:24:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:31,581 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4631 transitions. [2021-07-09 17:24:31,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4631 transitions. [2021-07-09 17:24:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:31,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:31,583 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9187 [2021-07-09 17:24:31,800 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:31,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1559917892, now seen corresponding path program 239 times [2021-07-09 17:24:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029897566] [2021-07-09 17:24:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:31,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:31,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029897566] [2021-07-09 17:24:31,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029897566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:31,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937100504] [2021-07-09 17:24:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:31,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:32,225 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 17:24:32,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:33,456 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 235 [2021-07-09 17:24:33,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:33,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:33,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:33,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:33,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937100504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:33,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:33,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:33,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386578226] [2021-07-09 17:24:33,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:33,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:33,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:33,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:33,838 INFO L87 Difference]: Start difference. First operand 1514 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:34,312 INFO L93 Difference]: Finished difference Result 1653 states and 4904 transitions. [2021-07-09 17:24:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:34,315 INFO L225 Difference]: With dead ends: 1653 [2021-07-09 17:24:34,315 INFO L226 Difference]: Without dead ends: 1640 [2021-07-09 17:24:34,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-07-09 17:24:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1514. [2021-07-09 17:24:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.056179775280899) internal successors, (4624), 1513 states have internal predecessors, (4624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4624 transitions. [2021-07-09 17:24:34,336 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4624 transitions. Word has length 20 [2021-07-09 17:24:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:34,336 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4624 transitions. [2021-07-09 17:24:34,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4624 transitions. [2021-07-09 17:24:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:34,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:34,338 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:34,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9390,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:34,555 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1232376888, now seen corresponding path program 240 times [2021-07-09 17:24:34,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:34,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806346607] [2021-07-09 17:24:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:34,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806346607] [2021-07-09 17:24:34,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806346607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249591776] [2021-07-09 17:24:34,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:34,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:34,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:34,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:34,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:35,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:35,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:35,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:35,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249591776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:35,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:35,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172188679] [2021-07-09 17:24:35,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:35,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:35,262 INFO L87 Difference]: Start difference. First operand 1514 states and 4624 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:35,632 INFO L93 Difference]: Finished difference Result 1609 states and 4809 transitions. [2021-07-09 17:24:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:24:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:35,635 INFO L225 Difference]: With dead ends: 1609 [2021-07-09 17:24:35,635 INFO L226 Difference]: Without dead ends: 1604 [2021-07-09 17:24:35,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-09 17:24:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1517. [2021-07-09 17:24:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.058047493403694) internal successors, (4636), 1516 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4636 transitions. [2021-07-09 17:24:35,657 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4636 transitions. Word has length 20 [2021-07-09 17:24:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:35,658 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 4636 transitions. [2021-07-09 17:24:35,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4636 transitions. [2021-07-09 17:24:35,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:35,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:35,660 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:35,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9645 [2021-07-09 17:24:35,872 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -493102570, now seen corresponding path program 241 times [2021-07-09 17:24:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:35,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591784903] [2021-07-09 17:24:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:35,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591784903] [2021-07-09 17:24:35,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591784903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819607218] [2021-07-09 17:24:35,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:35,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:36,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:36,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:37,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:37,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:37,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:37,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819607218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:37,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:37,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:37,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130923136] [2021-07-09 17:24:37,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:37,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:37,209 INFO L87 Difference]: Start difference. First operand 1517 states and 4636 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:37,619 INFO L93 Difference]: Finished difference Result 1614 states and 4819 transitions. [2021-07-09 17:24:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:37,621 INFO L225 Difference]: With dead ends: 1614 [2021-07-09 17:24:37,621 INFO L226 Difference]: Without dead ends: 1605 [2021-07-09 17:24:37,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-09 17:24:37,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1515. [2021-07-09 17:24:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-07-09 17:24:37,642 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-07-09 17:24:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:37,642 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-07-09 17:24:37,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-07-09 17:24:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:37,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:37,644 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:37,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9740,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:37,861 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash 996302426, now seen corresponding path program 242 times [2021-07-09 17:24:37,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:37,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15453326] [2021-07-09 17:24:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:37,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15453326] [2021-07-09 17:24:37,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15453326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307137067] [2021-07-09 17:24:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:37,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:38,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:39,221 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 220 [2021-07-09 17:24:39,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:39,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:39,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:39,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:39,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307137067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:39,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:39,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:39,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779939515] [2021-07-09 17:24:39,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:39,483 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:39,758 INFO L93 Difference]: Finished difference Result 1606 states and 4806 transitions. [2021-07-09 17:24:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:39,761 INFO L225 Difference]: With dead ends: 1606 [2021-07-09 17:24:39,761 INFO L226 Difference]: Without dead ends: 1601 [2021-07-09 17:24:39,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:24:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-07-09 17:24:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1515. [2021-07-09 17:24:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.058784676354029) internal successors, (4631), 1514 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4631 transitions. [2021-07-09 17:24:39,784 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4631 transitions. Word has length 20 [2021-07-09 17:24:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:39,784 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 4631 transitions. [2021-07-09 17:24:39,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4631 transitions. [2021-07-09 17:24:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:39,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:39,786 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:40,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9918 [2021-07-09 17:24:40,005 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash -76782954, now seen corresponding path program 243 times [2021-07-09 17:24:40,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:40,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035269875] [2021-07-09 17:24:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:40,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035269875] [2021-07-09 17:24:40,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035269875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135043588] [2021-07-09 17:24:40,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:40,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:24:40,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:40,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:40,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:40,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:40,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:40,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:40,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:40,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:40,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135043588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:40,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:40,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:40,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397259707] [2021-07-09 17:24:40,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:40,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:40,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:40,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:40,623 INFO L87 Difference]: Start difference. First operand 1515 states and 4631 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:41,003 INFO L93 Difference]: Finished difference Result 1644 states and 4888 transitions. [2021-07-09 17:24:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:41,006 INFO L225 Difference]: With dead ends: 1644 [2021-07-09 17:24:41,006 INFO L226 Difference]: Without dead ends: 1631 [2021-07-09 17:24:41,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-09 17:24:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1515. [2021-07-09 17:24:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.0574636723910174) internal successors, (4629), 1514 states have internal predecessors, (4629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 4629 transitions. [2021-07-09 17:24:41,027 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 4629 transitions. Word has length 20 [2021-07-09 17:24:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,028 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 4629 transitions. [2021-07-09 17:24:41,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 4629 transitions. [2021-07-09 17:24:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:41,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,030 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10169,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,245 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,245 INFO L82 PathProgramCache]: Analyzing trace with hash 642836373, now seen corresponding path program 244 times [2021-07-09 17:24:41,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323895149] [2021-07-09 17:24:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323895149] [2021-07-09 17:24:41,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323895149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454503332] [2021-07-09 17:24:41,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454503332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:41,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:41,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222648038] [2021-07-09 17:24:41,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:41,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:41,353 INFO L87 Difference]: Start difference. First operand 1515 states and 4629 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:41,444 INFO L93 Difference]: Finished difference Result 1871 states and 5337 transitions. [2021-07-09 17:24:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:24:41,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:41,447 INFO L225 Difference]: With dead ends: 1871 [2021-07-09 17:24:41,447 INFO L226 Difference]: Without dead ends: 1871 [2021-07-09 17:24:41,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:24:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-07-09 17:24:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1073. [2021-07-09 17:24:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-07-09 17:24:41,464 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-07-09 17:24:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:41,464 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-07-09 17:24:41,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-07-09 17:24:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:41,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:41,465 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:41,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,681 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1017308634, now seen corresponding path program 245 times [2021-07-09 17:24:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035798919] [2021-07-09 17:24:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:41,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:41,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035798919] [2021-07-09 17:24:41,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035798919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:41,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860173047] [2021-07-09 17:24:41,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:41,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:24:41,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:41,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:42,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:42,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:42,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:42,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:42,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:42,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860173047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:42,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:42,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:42,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083014253] [2021-07-09 17:24:42,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:42,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:42,703 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:42,995 INFO L93 Difference]: Finished difference Result 1252 states and 3621 transitions. [2021-07-09 17:24:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:42,997 INFO L225 Difference]: With dead ends: 1252 [2021-07-09 17:24:42,997 INFO L226 Difference]: Without dead ends: 1247 [2021-07-09 17:24:42,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-07-09 17:24:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1073. [2021-07-09 17:24:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.0) internal successors, (3216), 1072 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3216 transitions. [2021-07-09 17:24:43,009 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3216 transitions. Word has length 20 [2021-07-09 17:24:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:43,009 INFO L482 AbstractCegarLoop]: Abstraction has 1073 states and 3216 transitions. [2021-07-09 17:24:43,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3216 transitions. [2021-07-09 17:24:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:43,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:43,010 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:43,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,227 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash 136490107, now seen corresponding path program 246 times [2021-07-09 17:24:43,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:43,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904811091] [2021-07-09 17:24:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:43,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904811091] [2021-07-09 17:24:43,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904811091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605635714] [2021-07-09 17:24:43,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:24:43,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605635714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:43,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:24:43,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670039822] [2021-07-09 17:24:43,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:24:43,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:43,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:24:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:24:43,326 INFO L87 Difference]: Start difference. First operand 1073 states and 3216 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:43,446 INFO L93 Difference]: Finished difference Result 1821 states and 5166 transitions. [2021-07-09 17:24:43,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:24:43,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:43,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:43,449 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 17:24:43,449 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 17:24:43,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:24:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 17:24:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1372. [2021-07-09 17:24:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.047410649161196) internal successors, (4178), 1371 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) [2021-07-09 17:24:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4178 transitions. [2021-07-09 17:24:43,467 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4178 transitions. Word has length 20 [2021-07-09 17:24:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:43,467 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4178 transitions. [2021-07-09 17:24:43,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4178 transitions. [2021-07-09 17:24:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:43,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:43,468 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:43,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10417,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,684 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1110932366, now seen corresponding path program 247 times [2021-07-09 17:24:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330272348] [2021-07-09 17:24:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330272348] [2021-07-09 17:24:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330272348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485863446] [2021-07-09 17:24:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:43,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:44,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:44,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:44,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:44,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:44,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:44,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:44,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485863446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:44,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:44,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:44,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346883455] [2021-07-09 17:24:44,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:44,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:44,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:44,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:44,697 INFO L87 Difference]: Start difference. First operand 1372 states and 4178 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:45,053 INFO L93 Difference]: Finished difference Result 1418 states and 4257 transitions. [2021-07-09 17:24:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:24:45,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:45,056 INFO L225 Difference]: With dead ends: 1418 [2021-07-09 17:24:45,056 INFO L226 Difference]: Without dead ends: 1386 [2021-07-09 17:24:45,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-07-09 17:24:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1374. [2021-07-09 17:24:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0458849235251275) internal successors, (4182), 1373 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4182 transitions. [2021-07-09 17:24:45,072 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4182 transitions. Word has length 20 [2021-07-09 17:24:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:45,072 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4182 transitions. [2021-07-09 17:24:45,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4182 transitions. [2021-07-09 17:24:45,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:45,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:45,078 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:45,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10418 [2021-07-09 17:24:45,295 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash -519119568, now seen corresponding path program 248 times [2021-07-09 17:24:45,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:45,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813007993] [2021-07-09 17:24:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:45,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813007993] [2021-07-09 17:24:45,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813007993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:45,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705747630] [2021-07-09 17:24:45,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:45,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:45,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:45,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:45,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:46,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:46,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:46,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:46,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705747630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:46,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:46,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126842658] [2021-07-09 17:24:46,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:46,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:46,111 INFO L87 Difference]: Start difference. First operand 1374 states and 4182 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:46,437 INFO L93 Difference]: Finished difference Result 1463 states and 4324 transitions. [2021-07-09 17:24:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:46,447 INFO L225 Difference]: With dead ends: 1463 [2021-07-09 17:24:46,447 INFO L226 Difference]: Without dead ends: 1440 [2021-07-09 17:24:46,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-07-09 17:24:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1374. [2021-07-09 17:24:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0356882738528768) internal successors, (4168), 1373 states have internal predecessors, (4168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4168 transitions. [2021-07-09 17:24:46,472 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4168 transitions. Word has length 20 [2021-07-09 17:24:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:46,472 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4168 transitions. [2021-07-09 17:24:46,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4168 transitions. [2021-07-09 17:24:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:46,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:46,475 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:46,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10554 [2021-07-09 17:24:46,692 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:46,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1592204948, now seen corresponding path program 249 times [2021-07-09 17:24:46,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:46,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553652411] [2021-07-09 17:24:46,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:46,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:46,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553652411] [2021-07-09 17:24:46,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553652411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:46,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3200761] [2021-07-09 17:24:46,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:24:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:47,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:47,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:47,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:47,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:47,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:47,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3200761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:47,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:47,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572519822] [2021-07-09 17:24:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:47,500 INFO L87 Difference]: Start difference. First operand 1374 states and 4168 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:47,917 INFO L93 Difference]: Finished difference Result 1493 states and 4350 transitions. [2021-07-09 17:24:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:24:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:47,919 INFO L225 Difference]: With dead ends: 1493 [2021-07-09 17:24:47,919 INFO L226 Difference]: Without dead ends: 1464 [2021-07-09 17:24:47,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:24:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-07-09 17:24:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1374. [2021-07-09 17:24:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0276766205389656) internal successors, (4157), 1373 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4157 transitions. [2021-07-09 17:24:47,935 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4157 transitions. Word has length 20 [2021-07-09 17:24:47,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:47,935 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4157 transitions. [2021-07-09 17:24:47,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4157 transitions. [2021-07-09 17:24:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:47,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:47,936 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:48,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10652,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:48,153 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash -498113360, now seen corresponding path program 250 times [2021-07-09 17:24:48,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:48,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938807348] [2021-07-09 17:24:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:48,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938807348] [2021-07-09 17:24:48,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938807348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705581225] [2021-07-09 17:24:48,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:48,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:48,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:48,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:48,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:48,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:48,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:48,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:48,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705581225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:48,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:48,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:48,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62129078] [2021-07-09 17:24:48,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:48,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:48,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:48,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:48,969 INFO L87 Difference]: Start difference. First operand 1374 states and 4157 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:49,342 INFO L93 Difference]: Finished difference Result 1523 states and 4457 transitions. [2021-07-09 17:24:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:49,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:49,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:49,344 INFO L225 Difference]: With dead ends: 1523 [2021-07-09 17:24:49,345 INFO L226 Difference]: Without dead ends: 1508 [2021-07-09 17:24:49,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-07-09 17:24:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1374. [2021-07-09 17:24:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.0269482884195194) internal successors, (4156), 1373 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4156 transitions. [2021-07-09 17:24:49,360 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4156 transitions. Word has length 20 [2021-07-09 17:24:49,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:49,360 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 4156 transitions. [2021-07-09 17:24:49,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4156 transitions. [2021-07-09 17:24:49,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:49,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:49,362 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:49,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10749,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:49,578 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1134580214, now seen corresponding path program 251 times [2021-07-09 17:24:49,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:49,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37525050] [2021-07-09 17:24:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:49,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:49,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37525050] [2021-07-09 17:24:49,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37525050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:49,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324251320] [2021-07-09 17:24:49,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:49,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:49,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 17:24:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:50,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:50,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:51,212 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 260 [2021-07-09 17:24:51,319 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 260 [2021-07-09 17:24:51,436 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 264 [2021-07-09 17:24:51,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:51,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:51,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:51,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:51,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324251320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:51,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:51,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:24:51,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038589177] [2021-07-09 17:24:51,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:24:51,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:24:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:24:51,622 INFO L87 Difference]: Start difference. First operand 1374 states and 4156 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:52,206 INFO L93 Difference]: Finished difference Result 1525 states and 4427 transitions. [2021-07-09 17:24:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:24:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:52,210 INFO L225 Difference]: With dead ends: 1525 [2021-07-09 17:24:52,210 INFO L226 Difference]: Without dead ends: 1490 [2021-07-09 17:24:52,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:24:52,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-07-09 17:24:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1366. [2021-07-09 17:24:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0278388278388277) internal successors, (4133), 1365 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4133 transitions. [2021-07-09 17:24:52,227 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4133 transitions. Word has length 20 [2021-07-09 17:24:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:52,227 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4133 transitions. [2021-07-09 17:24:52,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4133 transitions. [2021-07-09 17:24:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:52,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:52,229 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:52,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10829,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:52,445 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:52,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:52,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2107998158, now seen corresponding path program 252 times [2021-07-09 17:24:52,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:52,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316569974] [2021-07-09 17:24:52,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:52,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:52,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316569974] [2021-07-09 17:24:52,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316569974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:52,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651196146] [2021-07-09 17:24:52,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:52,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:24:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:52,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:52,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:53,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:53,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:53,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:53,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:53,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651196146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:53,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:53,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032506872] [2021-07-09 17:24:53,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:53,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:53,207 INFO L87 Difference]: Start difference. First operand 1366 states and 4133 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:53,519 INFO L93 Difference]: Finished difference Result 1431 states and 4256 transitions. [2021-07-09 17:24:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:24:53,520 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:24:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:53,522 INFO L225 Difference]: With dead ends: 1431 [2021-07-09 17:24:53,522 INFO L226 Difference]: Without dead ends: 1422 [2021-07-09 17:24:53,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:24:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-07-09 17:24:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1364. [2021-07-09 17:24:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-07-09 17:24:53,540 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-07-09 17:24:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:53,540 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-07-09 17:24:53,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-07-09 17:24:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:53,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:53,542 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:53,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11124 [2021-07-09 17:24:53,745 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:53,745 INFO L82 PathProgramCache]: Analyzing trace with hash 382518700, now seen corresponding path program 253 times [2021-07-09 17:24:53,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:53,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584722259] [2021-07-09 17:24:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:53,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584722259] [2021-07-09 17:24:53,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584722259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385271775] [2021-07-09 17:24:53,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:53,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:53,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:54,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:54,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:54,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:54,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:54,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:54,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:54,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385271775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:54,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:54,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:24:54,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527510860] [2021-07-09 17:24:54,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:24:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:24:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:24:54,709 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:55,065 INFO L93 Difference]: Finished difference Result 1429 states and 4239 transitions. [2021-07-09 17:24:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:24:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:24:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:55,067 INFO L225 Difference]: With dead ends: 1429 [2021-07-09 17:24:55,067 INFO L226 Difference]: Without dead ends: 1424 [2021-07-09 17:24:55,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:24:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-07-09 17:24:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1364. [2021-07-09 17:24:55,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 3.0234776228906823) internal successors, (4121), 1363 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4121 transitions. [2021-07-09 17:24:55,084 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4121 transitions. Word has length 20 [2021-07-09 17:24:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:55,084 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 4121 transitions. [2021-07-09 17:24:55,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4121 transitions. [2021-07-09 17:24:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:55,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:55,086 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:55,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11209,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:55,302 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1871923696, now seen corresponding path program 254 times [2021-07-09 17:24:55,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:55,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293688722] [2021-07-09 17:24:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:55,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293688722] [2021-07-09 17:24:55,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293688722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:55,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587236326] [2021-07-09 17:24:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:55,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:24:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:55,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:55,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:56,304 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 273 [2021-07-09 17:24:56,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:56,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:56,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:56,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:56,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587236326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:56,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:56,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:56,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550644081] [2021-07-09 17:24:56,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:56,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:56,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:56,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:56,984 INFO L87 Difference]: Start difference. First operand 1364 states and 4121 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:57,470 INFO L93 Difference]: Finished difference Result 1463 states and 4289 transitions. [2021-07-09 17:24:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:24:57,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:57,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:57,473 INFO L225 Difference]: With dead ends: 1463 [2021-07-09 17:24:57,473 INFO L226 Difference]: Without dead ends: 1440 [2021-07-09 17:24:57,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:24:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-07-09 17:24:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1366. [2021-07-09 17:24:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.0065934065934066) internal successors, (4104), 1365 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4104 transitions. [2021-07-09 17:24:57,489 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4104 transitions. Word has length 20 [2021-07-09 17:24:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:57,489 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4104 transitions. [2021-07-09 17:24:57,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4104 transitions. [2021-07-09 17:24:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:57,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:57,490 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:57,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11323 [2021-07-09 17:24:57,693 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash 980602065, now seen corresponding path program 255 times [2021-07-09 17:24:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928848755] [2021-07-09 17:24:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:57,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:57,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928848755] [2021-07-09 17:24:57,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928848755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:57,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106223922] [2021-07-09 17:24:57,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:57,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:24:57,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:24:57,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:57,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106223922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:57,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:57,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:24:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060059687] [2021-07-09 17:24:57,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:24:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:24:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:24:57,787 INFO L87 Difference]: Start difference. First operand 1366 states and 4104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:57,854 INFO L93 Difference]: Finished difference Result 1698 states and 4827 transitions. [2021-07-09 17:24:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:24:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:24:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:57,857 INFO L225 Difference]: With dead ends: 1698 [2021-07-09 17:24:57,857 INFO L226 Difference]: Without dead ends: 1698 [2021-07-09 17:24:57,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:24:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-07-09 17:24:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1390. [2021-07-09 17:24:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-07-09 17:24:57,878 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-07-09 17:24:57,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:57,878 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-07-09 17:24:57,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-07-09 17:24:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:57,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:57,880 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:58,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11574,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:58,098 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:58,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:58,098 INFO L82 PathProgramCache]: Analyzing trace with hash 798838316, now seen corresponding path program 256 times [2021-07-09 17:24:58,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:58,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945476923] [2021-07-09 17:24:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:24:58,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:58,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945476923] [2021-07-09 17:24:58,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945476923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:58,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877017949] [2021-07-09 17:24:58,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:58,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:24:58,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:58,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:58,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:58,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:24:58,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:24:58,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:58,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:24:58,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:24:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:58,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877017949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:58,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:24:58,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:24:58,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122869567] [2021-07-09 17:24:58,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:24:58,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:24:58,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:24:58,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:24:58,954 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:24:59,255 INFO L93 Difference]: Finished difference Result 1514 states and 4411 transitions. [2021-07-09 17:24:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:24:59,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:24:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:24:59,257 INFO L225 Difference]: With dead ends: 1514 [2021-07-09 17:24:59,257 INFO L226 Difference]: Without dead ends: 1509 [2021-07-09 17:24:59,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:24:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-07-09 17:24:59,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1390. [2021-07-09 17:24:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0057595392368612) internal successors, (4175), 1389 states have internal predecessors, (4175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4175 transitions. [2021-07-09 17:24:59,273 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4175 transitions. Word has length 20 [2021-07-09 17:24:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:24:59,273 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4175 transitions. [2021-07-09 17:24:59,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:24:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4175 transitions. [2021-07-09 17:24:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:24:59,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:24:59,275 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:24:59,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11575 [2021-07-09 17:24:59,489 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:24:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:24:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1892929904, now seen corresponding path program 257 times [2021-07-09 17:24:59,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:24:59,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173527931] [2021-07-09 17:24:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:24:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:24:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:24:59,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:24:59,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173527931] [2021-07-09 17:24:59,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173527931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:24:59,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430298937] [2021-07-09 17:24:59,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:24:59,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:24:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:24:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:24:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:24:59,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:24:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:01,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:01,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:01,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:01,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:01,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430298937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:01,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:01,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054044769] [2021-07-09 17:25:01,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:01,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:01,114 INFO L87 Difference]: Start difference. First operand 1390 states and 4175 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:01,556 INFO L93 Difference]: Finished difference Result 1554 states and 4501 transitions. [2021-07-09 17:25:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:01,560 INFO L225 Difference]: With dead ends: 1554 [2021-07-09 17:25:01,560 INFO L226 Difference]: Without dead ends: 1539 [2021-07-09 17:25:01,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2021-07-09 17:25:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1390. [2021-07-09 17:25:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.0043196544276456) internal successors, (4173), 1389 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4173 transitions. [2021-07-09 17:25:01,584 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4173 transitions. Word has length 20 [2021-07-09 17:25:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:01,584 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4173 transitions. [2021-07-09 17:25:01,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4173 transitions. [2021-07-09 17:25:01,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:01,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:01,586 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:01,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11734,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:01,805 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1012111377, now seen corresponding path program 258 times [2021-07-09 17:25:01,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:01,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804848702] [2021-07-09 17:25:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:01,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804848702] [2021-07-09 17:25:01,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804848702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466902815] [2021-07-09 17:25:01,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:01,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:01,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:01,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466902815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:01,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:01,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:25:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476473473] [2021-07-09 17:25:01,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:01,914 INFO L87 Difference]: Start difference. First operand 1390 states and 4173 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:02,022 INFO L93 Difference]: Finished difference Result 2615 states and 7716 transitions. [2021-07-09 17:25:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:02,026 INFO L225 Difference]: With dead ends: 2615 [2021-07-09 17:25:02,026 INFO L226 Difference]: Without dead ends: 2615 [2021-07-09 17:25:02,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:25:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-07-09 17:25:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2343. [2021-07-09 17:25:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-07-09 17:25:02,058 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-07-09 17:25:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:02,058 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-07-09 17:25:02,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-07-09 17:25:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:02,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:02,061 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:02,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11908 [2021-07-09 17:25:02,278 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1450030764, now seen corresponding path program 259 times [2021-07-09 17:25:02,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:02,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355885677] [2021-07-09 17:25:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:02,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:02,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355885677] [2021-07-09 17:25:02,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355885677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:02,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136008930] [2021-07-09 17:25:02,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:02,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:02,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:02,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:03,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:03,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:03,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:03,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136008930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:03,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:03,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255799321] [2021-07-09 17:25:03,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:03,659 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:04,153 INFO L93 Difference]: Finished difference Result 2710 states and 8145 transitions. [2021-07-09 17:25:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:04,158 INFO L225 Difference]: With dead ends: 2710 [2021-07-09 17:25:04,158 INFO L226 Difference]: Without dead ends: 2705 [2021-07-09 17:25:04,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-07-09 17:25:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2343. [2021-07-09 17:25:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.0572160546541416) internal successors, (7160), 2342 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7160 transitions. [2021-07-09 17:25:04,193 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7160 transitions. Word has length 20 [2021-07-09 17:25:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:04,193 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 7160 transitions. [2021-07-09 17:25:04,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7160 transitions. [2021-07-09 17:25:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:04,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:04,196 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:04,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11909 [2021-07-09 17:25:04,397 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1799720981, now seen corresponding path program 260 times [2021-07-09 17:25:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037065228] [2021-07-09 17:25:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:04,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:04,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037065228] [2021-07-09 17:25:04,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037065228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:04,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475195496] [2021-07-09 17:25:04,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:04,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:04,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:04,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475195496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:04,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:04,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:25:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081805686] [2021-07-09 17:25:04,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:04,507 INFO L87 Difference]: Start difference. First operand 2343 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:04,684 INFO L93 Difference]: Finished difference Result 3338 states and 9885 transitions. [2021-07-09 17:25:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:25:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:04,689 INFO L225 Difference]: With dead ends: 3338 [2021-07-09 17:25:04,689 INFO L226 Difference]: Without dead ends: 3338 [2021-07-09 17:25:04,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:25:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-07-09 17:25:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2994. [2021-07-09 17:25:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 3.05913798864016) internal successors, (9156), 2993 states have internal predecessors, (9156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 9156 transitions. [2021-07-09 17:25:04,737 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 9156 transitions. Word has length 20 [2021-07-09 17:25:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:04,737 INFO L482 AbstractCegarLoop]: Abstraction has 2994 states and 9156 transitions. [2021-07-09 17:25:04,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 9156 transitions. [2021-07-09 17:25:04,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:04,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:04,740 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:04,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12064,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:04,956 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1377490808, now seen corresponding path program 261 times [2021-07-09 17:25:04,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:04,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505186124] [2021-07-09 17:25:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:05,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:05,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505186124] [2021-07-09 17:25:05,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505186124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:05,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580895370] [2021-07-09 17:25:05,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:05,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:05,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:05,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:05,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:05,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:05,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:05,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:05,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580895370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:05,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:05,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:05,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133644113] [2021-07-09 17:25:05,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:05,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:05,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:05,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:05,964 INFO L87 Difference]: Start difference. First operand 2994 states and 9156 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:06,424 INFO L93 Difference]: Finished difference Result 3056 states and 9275 transitions. [2021-07-09 17:25:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:25:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:25:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:06,429 INFO L225 Difference]: With dead ends: 3056 [2021-07-09 17:25:06,429 INFO L226 Difference]: Without dead ends: 3044 [2021-07-09 17:25:06,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-07-09 17:25:06,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2990. [2021-07-09 17:25:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 3.0595516895282704) internal successors, (9145), 2989 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 9145 transitions. [2021-07-09 17:25:06,468 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 9145 transitions. Word has length 20 [2021-07-09 17:25:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:06,468 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 9145 transitions. [2021-07-09 17:25:06,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 9145 transitions. [2021-07-09 17:25:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:06,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:06,471 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:06,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12065 [2021-07-09 17:25:06,689 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:06,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1065396758, now seen corresponding path program 262 times [2021-07-09 17:25:06,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:06,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694808146] [2021-07-09 17:25:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:06,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:06,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694808146] [2021-07-09 17:25:06,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694808146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:06,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681305731] [2021-07-09 17:25:06,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:06,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:06,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:06,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:07,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:07,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:07,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:07,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:07,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:07,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:07,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681305731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:07,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:07,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119839471] [2021-07-09 17:25:07,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:07,593 INFO L87 Difference]: Start difference. First operand 2990 states and 9145 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:07,879 INFO L93 Difference]: Finished difference Result 3075 states and 9279 transitions. [2021-07-09 17:25:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:25:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:25:07,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:07,884 INFO L225 Difference]: With dead ends: 3075 [2021-07-09 17:25:07,884 INFO L226 Difference]: Without dead ends: 3062 [2021-07-09 17:25:07,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:25:07,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-07-09 17:25:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2992. [2021-07-09 17:25:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2991 states have (on average 3.051822133065864) internal successors, (9128), 2991 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 9128 transitions. [2021-07-09 17:25:07,926 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 9128 transitions. Word has length 20 [2021-07-09 17:25:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:07,926 INFO L482 AbstractCegarLoop]: Abstraction has 2992 states and 9128 transitions. [2021-07-09 17:25:07,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 9128 transitions. [2021-07-09 17:25:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:07,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:07,929 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:08,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12147 [2021-07-09 17:25:08,145 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2135478950, now seen corresponding path program 263 times [2021-07-09 17:25:08,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:08,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659046270] [2021-07-09 17:25:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:08,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:08,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659046270] [2021-07-09 17:25:08,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659046270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:08,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217094070] [2021-07-09 17:25:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:08,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:25:08,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:08,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:08,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:08,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:08,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:09,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:09,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:09,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:09,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:09,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217094070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:09,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:09,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660295440] [2021-07-09 17:25:09,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:09,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:09,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:09,356 INFO L87 Difference]: Start difference. First operand 2992 states and 9128 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:09,745 INFO L93 Difference]: Finished difference Result 3101 states and 9293 transitions. [2021-07-09 17:25:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:09,750 INFO L225 Difference]: With dead ends: 3101 [2021-07-09 17:25:09,750 INFO L226 Difference]: Without dead ends: 3076 [2021-07-09 17:25:09,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:09,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-07-09 17:25:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2982. [2021-07-09 17:25:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-07-09 17:25:09,791 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-07-09 17:25:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:09,791 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-07-09 17:25:09,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-07-09 17:25:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:09,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:09,794 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12254,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:09,996 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:09,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1716589206, now seen corresponding path program 264 times [2021-07-09 17:25:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:09,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130985886] [2021-07-09 17:25:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:10,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130985886] [2021-07-09 17:25:10,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130985886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363081619] [2021-07-09 17:25:10,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:10,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:25:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:10,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:10,453 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-07-09 17:25:10,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:10,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:10,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:10,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:10,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:10,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363081619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:10,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:10,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:10,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007346872] [2021-07-09 17:25:10,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:10,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:10,888 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:11,353 INFO L93 Difference]: Finished difference Result 3164 states and 9474 transitions. [2021-07-09 17:25:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:11,359 INFO L225 Difference]: With dead ends: 3164 [2021-07-09 17:25:11,359 INFO L226 Difference]: Without dead ends: 3159 [2021-07-09 17:25:11,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2021-07-09 17:25:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2982. [2021-07-09 17:25:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-07-09 17:25:11,408 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-07-09 17:25:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:11,408 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-07-09 17:25:11,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-07-09 17:25:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:11,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:11,412 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:11,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12347 [2021-07-09 17:25:11,625 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -72987268, now seen corresponding path program 265 times [2021-07-09 17:25:11,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:11,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913706002] [2021-07-09 17:25:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:11,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:11,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913706002] [2021-07-09 17:25:11,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913706002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:11,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477217484] [2021-07-09 17:25:11,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:12,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:12,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:12,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:12,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:12,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:12,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:12,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477217484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:12,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:12,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161862767] [2021-07-09 17:25:12,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:12,658 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:13,020 INFO L93 Difference]: Finished difference Result 3032 states and 9158 transitions. [2021-07-09 17:25:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:25:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:25:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:13,024 INFO L225 Difference]: With dead ends: 3032 [2021-07-09 17:25:13,024 INFO L226 Difference]: Without dead ends: 3022 [2021-07-09 17:25:13,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:25:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-07-09 17:25:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2982. [2021-07-09 17:25:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0385776585038577) internal successors, (9058), 2981 states have internal predecessors, (9058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9058 transitions. [2021-07-09 17:25:13,106 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9058 transitions. Word has length 20 [2021-07-09 17:25:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:13,106 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9058 transitions. [2021-07-09 17:25:13,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9058 transitions. [2021-07-09 17:25:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:13,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:13,109 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:13,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12441,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:13,325 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:13,326 INFO L82 PathProgramCache]: Analyzing trace with hash -834014084, now seen corresponding path program 266 times [2021-07-09 17:25:13,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:13,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164421399] [2021-07-09 17:25:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:13,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164421399] [2021-07-09 17:25:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164421399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626782667] [2021-07-09 17:25:13,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:13,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:13,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:13,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:13,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:14,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:14,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:14,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:14,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:14,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626782667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:14,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:14,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:14,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926198545] [2021-07-09 17:25:14,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:14,793 INFO L87 Difference]: Start difference. First operand 2982 states and 9058 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:15,200 INFO L93 Difference]: Finished difference Result 3204 states and 9569 transitions. [2021-07-09 17:25:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:15,207 INFO L225 Difference]: With dead ends: 3204 [2021-07-09 17:25:15,207 INFO L226 Difference]: Without dead ends: 3187 [2021-07-09 17:25:15,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-07-09 17:25:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2982. [2021-07-09 17:25:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-07-09 17:25:15,252 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-07-09 17:25:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:15,252 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-07-09 17:25:15,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-07-09 17:25:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:15,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:15,255 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:15,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12564 [2021-07-09 17:25:15,472 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash -812513544, now seen corresponding path program 267 times [2021-07-09 17:25:15,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:15,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466471288] [2021-07-09 17:25:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:15,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466471288] [2021-07-09 17:25:15,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466471288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641853735] [2021-07-09 17:25:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:15,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:15,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:15,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:15,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:16,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:16,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:16,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:16,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:16,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641853735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:16,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:16,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:16,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532844223] [2021-07-09 17:25:16,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:16,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:16,277 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:16,598 INFO L93 Difference]: Finished difference Result 3020 states and 9115 transitions. [2021-07-09 17:25:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:25:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:25:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:16,604 INFO L225 Difference]: With dead ends: 3020 [2021-07-09 17:25:16,604 INFO L226 Difference]: Without dead ends: 3015 [2021-07-09 17:25:16,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:25:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3015 states. [2021-07-09 17:25:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3015 to 2982. [2021-07-09 17:25:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-07-09 17:25:16,649 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-07-09 17:25:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:16,649 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-07-09 17:25:16,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-07-09 17:25:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:16,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:16,652 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:16,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12703,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:16,870 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1756974294, now seen corresponding path program 268 times [2021-07-09 17:25:16,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:16,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889983966] [2021-07-09 17:25:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:16,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:16,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889983966] [2021-07-09 17:25:16,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889983966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:16,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69492962] [2021-07-09 17:25:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:16,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:16,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:17,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:18,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:18,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:18,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:18,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:18,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69492962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:18,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:18,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:18,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632613572] [2021-07-09 17:25:18,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:18,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:18,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:18,331 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:18,790 INFO L93 Difference]: Finished difference Result 3037 states and 9140 transitions. [2021-07-09 17:25:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:25:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:18,795 INFO L225 Difference]: With dead ends: 3037 [2021-07-09 17:25:18,795 INFO L226 Difference]: Without dead ends: 3032 [2021-07-09 17:25:18,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-07-09 17:25:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2982. [2021-07-09 17:25:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-07-09 17:25:18,836 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-07-09 17:25:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:18,836 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-07-09 17:25:18,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-07-09 17:25:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:18,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:18,839 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:19,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12800 [2021-07-09 17:25:19,055 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:19,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1048588006, now seen corresponding path program 269 times [2021-07-09 17:25:19,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:19,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530086524] [2021-07-09 17:25:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:19,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:19,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530086524] [2021-07-09 17:25:19,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530086524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:19,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114341810] [2021-07-09 17:25:19,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:19,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:25:19,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:19,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:19,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:19,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:19,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:19,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:19,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:19,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:19,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:19,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114341810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:19,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:19,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771780637] [2021-07-09 17:25:19,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:19,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:19,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:19,698 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:20,032 INFO L93 Difference]: Finished difference Result 3082 states and 9238 transitions. [2021-07-09 17:25:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:25:20,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:25:20,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:20,037 INFO L225 Difference]: With dead ends: 3082 [2021-07-09 17:25:20,037 INFO L226 Difference]: Without dead ends: 3077 [2021-07-09 17:25:20,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:25:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-07-09 17:25:20,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2982. [2021-07-09 17:25:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 3.0332103321033212) internal successors, (9042), 2981 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 9042 transitions. [2021-07-09 17:25:20,077 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 9042 transitions. Word has length 20 [2021-07-09 17:25:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:20,077 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 9042 transitions. [2021-07-09 17:25:20,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 9042 transitions. [2021-07-09 17:25:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:20,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:20,080 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:20,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12987,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:20,296 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2121673386, now seen corresponding path program 270 times [2021-07-09 17:25:20,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:20,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695218358] [2021-07-09 17:25:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:20,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:20,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695218358] [2021-07-09 17:25:20,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695218358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:20,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549997608] [2021-07-09 17:25:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:20,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:25:20,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:20,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:20,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:21,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:21,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:21,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:21,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:21,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549997608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:21,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:21,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:21,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266778747] [2021-07-09 17:25:21,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:21,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:21,084 INFO L87 Difference]: Start difference. First operand 2982 states and 9042 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:21,531 INFO L93 Difference]: Finished difference Result 3139 states and 9381 transitions. [2021-07-09 17:25:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:25:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:21,536 INFO L225 Difference]: With dead ends: 3139 [2021-07-09 17:25:21,536 INFO L226 Difference]: Without dead ends: 3126 [2021-07-09 17:25:21,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-07-09 17:25:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2986. [2021-07-09 17:25:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.0268006700167502) internal successors, (9035), 2985 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 9035 transitions. [2021-07-09 17:25:21,577 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 9035 transitions. Word has length 20 [2021-07-09 17:25:21,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:21,577 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 9035 transitions. [2021-07-09 17:25:21,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:21,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 9035 transitions. [2021-07-09 17:25:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:21,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:21,580 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:21,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13063,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:21,797 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1402054059, now seen corresponding path program 271 times [2021-07-09 17:25:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:21,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409035466] [2021-07-09 17:25:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:21,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:21,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409035466] [2021-07-09 17:25:21,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409035466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:21,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107617110] [2021-07-09 17:25:21,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:21,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:21,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107617110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:21,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:21,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:25:21,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274273942] [2021-07-09 17:25:21,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:21,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:21,932 INFO L87 Difference]: Start difference. First operand 2986 states and 9035 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:22,038 INFO L93 Difference]: Finished difference Result 3429 states and 10006 transitions. [2021-07-09 17:25:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:22,043 INFO L225 Difference]: With dead ends: 3429 [2021-07-09 17:25:22,043 INFO L226 Difference]: Without dead ends: 3429 [2021-07-09 17:25:22,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:25:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-07-09 17:25:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2845. [2021-07-09 17:25:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-07-09 17:25:22,095 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-07-09 17:25:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:22,095 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-07-09 17:25:22,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-07-09 17:25:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:22,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:22,098 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:22,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13145,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:22,309 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1027581798, now seen corresponding path program 272 times [2021-07-09 17:25:22,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:22,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594734766] [2021-07-09 17:25:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:22,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:22,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594734766] [2021-07-09 17:25:22,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594734766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:22,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513260327] [2021-07-09 17:25:22,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:22,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:22,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:22,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:23,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:23,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:23,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:23,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:23,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513260327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:23,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:23,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:23,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052865167] [2021-07-09 17:25:23,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:23,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:23,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:23,436 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:23,804 INFO L93 Difference]: Finished difference Result 3008 states and 8868 transitions. [2021-07-09 17:25:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:25:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:25:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:23,810 INFO L225 Difference]: With dead ends: 3008 [2021-07-09 17:25:23,810 INFO L226 Difference]: Without dead ends: 3003 [2021-07-09 17:25:23,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-07-09 17:25:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2845. [2021-07-09 17:25:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9947257383966246) internal successors, (8517), 2844 states have internal predecessors, (8517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8517 transitions. [2021-07-09 17:25:23,851 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8517 transitions. Word has length 20 [2021-07-09 17:25:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:23,851 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8517 transitions. [2021-07-09 17:25:23,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:23,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8517 transitions. [2021-07-09 17:25:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:23,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:23,854 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:24,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13146 [2021-07-09 17:25:24,068 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1908400325, now seen corresponding path program 273 times [2021-07-09 17:25:24,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:24,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823747176] [2021-07-09 17:25:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:24,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:24,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823747176] [2021-07-09 17:25:24,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823747176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:24,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888574252] [2021-07-09 17:25:24,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:24,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:25:24,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:24,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888574252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:24,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:24,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:25:24,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171696037] [2021-07-09 17:25:24,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:24,174 INFO L87 Difference]: Start difference. First operand 2845 states and 8517 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:24,256 INFO L93 Difference]: Finished difference Result 3840 states and 11378 transitions. [2021-07-09 17:25:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:25:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:24,262 INFO L225 Difference]: With dead ends: 3840 [2021-07-09 17:25:24,262 INFO L226 Difference]: Without dead ends: 3840 [2021-07-09 17:25:24,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:25:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2021-07-09 17:25:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 3571. [2021-07-09 17:25:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0103641456582633) internal successors, (10747), 3570 states have internal predecessors, (10747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10747 transitions. [2021-07-09 17:25:24,314 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10747 transitions. Word has length 20 [2021-07-09 17:25:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:24,314 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 10747 transitions. [2021-07-09 17:25:24,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10747 transitions. [2021-07-09 17:25:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:24,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:24,317 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:24,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13255,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:24,534 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:24,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:24,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1470480938, now seen corresponding path program 274 times [2021-07-09 17:25:24,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:24,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501019779] [2021-07-09 17:25:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:24,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:24,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501019779] [2021-07-09 17:25:24,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501019779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:24,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124773490] [2021-07-09 17:25:24,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:24,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:24,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:26,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:26,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:26,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:26,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:26,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124773490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:26,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:26,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446233621] [2021-07-09 17:25:26,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:26,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:26,024 INFO L87 Difference]: Start difference. First operand 3571 states and 10747 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:26,485 INFO L93 Difference]: Finished difference Result 3789 states and 11234 transitions. [2021-07-09 17:25:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:26,490 INFO L225 Difference]: With dead ends: 3789 [2021-07-09 17:25:26,490 INFO L226 Difference]: Without dead ends: 3772 [2021-07-09 17:25:26,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-07-09 17:25:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3571. [2021-07-09 17:25:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 3.0095238095238095) internal successors, (10744), 3570 states have internal predecessors, (10744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10744 transitions. [2021-07-09 17:25:26,540 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10744 transitions. Word has length 20 [2021-07-09 17:25:26,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:26,540 INFO L482 AbstractCegarLoop]: Abstraction has 3571 states and 10744 transitions. [2021-07-09 17:25:26,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10744 transitions. [2021-07-09 17:25:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:26,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:26,543 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:26,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13256 [2021-07-09 17:25:26,760 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash -425265387, now seen corresponding path program 275 times [2021-07-09 17:25:26,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:26,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547411357] [2021-07-09 17:25:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:26,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547411357] [2021-07-09 17:25:26,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547411357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:26,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951672130] [2021-07-09 17:25:26,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:26,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:25:26,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:26,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:26,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951672130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:26,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:26,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:25:26,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171681239] [2021-07-09 17:25:26,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:26,876 INFO L87 Difference]: Start difference. First operand 3571 states and 10744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:27,011 INFO L93 Difference]: Finished difference Result 3935 states and 11615 transitions. [2021-07-09 17:25:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:25:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:27,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:27,016 INFO L225 Difference]: With dead ends: 3935 [2021-07-09 17:25:27,016 INFO L226 Difference]: Without dead ends: 3935 [2021-07-09 17:25:27,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:27,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-07-09 17:25:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3315. [2021-07-09 17:25:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-07-09 17:25:27,067 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-07-09 17:25:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:27,067 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-07-09 17:25:27,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-07-09 17:25:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:27,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:27,070 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:27,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13470,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:27,287 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:27,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1979514906, now seen corresponding path program 276 times [2021-07-09 17:25:27,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:27,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312684544] [2021-07-09 17:25:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:27,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312684544] [2021-07-09 17:25:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312684544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:27,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273722771] [2021-07-09 17:25:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:27,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:27,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:27,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:27,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:27,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:27,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:28,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:28,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:28,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273722771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:28,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434387979] [2021-07-09 17:25:28,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:28,007 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:28,446 INFO L93 Difference]: Finished difference Result 3697 states and 10990 transitions. [2021-07-09 17:25:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:25:28,446 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:28,452 INFO L225 Difference]: With dead ends: 3697 [2021-07-09 17:25:28,452 INFO L226 Difference]: Without dead ends: 3692 [2021-07-09 17:25:28,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-07-09 17:25:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 3315. [2021-07-09 17:25:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.007845503922752) internal successors, (9968), 3314 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 9968 transitions. [2021-07-09 17:25:28,505 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 9968 transitions. Word has length 20 [2021-07-09 17:25:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:28,505 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 9968 transitions. [2021-07-09 17:25:28,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 9968 transitions. [2021-07-09 17:25:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:28,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:28,509 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:28,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13471,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:28,726 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1692722565, now seen corresponding path program 277 times [2021-07-09 17:25:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912343051] [2021-07-09 17:25:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:28,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912343051] [2021-07-09 17:25:28,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912343051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888466466] [2021-07-09 17:25:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:28,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888466466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:28,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:28,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:25:28,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733287057] [2021-07-09 17:25:28,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:28,852 INFO L87 Difference]: Start difference. First operand 3315 states and 9968 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:29,075 INFO L93 Difference]: Finished difference Result 3902 states and 11479 transitions. [2021-07-09 17:25:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:25:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:29,081 INFO L225 Difference]: With dead ends: 3902 [2021-07-09 17:25:29,081 INFO L226 Difference]: Without dead ends: 3902 [2021-07-09 17:25:29,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-07-09 17:25:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3561. [2021-07-09 17:25:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0095505617977527) internal successors, (10714), 3560 states have internal predecessors, (10714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10714 transitions. [2021-07-09 17:25:29,134 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10714 transitions. Word has length 20 [2021-07-09 17:25:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:29,134 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10714 transitions. [2021-07-09 17:25:29,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10714 transitions. [2021-07-09 17:25:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:29,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:29,138 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:29,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13539,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,355 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1050867918, now seen corresponding path program 278 times [2021-07-09 17:25:29,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:29,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754131661] [2021-07-09 17:25:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:29,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754131661] [2021-07-09 17:25:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754131661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142892349] [2021-07-09 17:25:29,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:29,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:29,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:29,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:30,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:30,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:30,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:30,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:30,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142892349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:30,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:30,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:30,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101323733] [2021-07-09 17:25:30,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:30,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:30,138 INFO L87 Difference]: Start difference. First operand 3561 states and 10714 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:30,731 INFO L93 Difference]: Finished difference Result 3658 states and 10896 transitions. [2021-07-09 17:25:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:25:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:25:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:30,737 INFO L225 Difference]: With dead ends: 3658 [2021-07-09 17:25:30,737 INFO L226 Difference]: Without dead ends: 3642 [2021-07-09 17:25:30,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:30,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2021-07-09 17:25:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 3561. [2021-07-09 17:25:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 3.0070224719101124) internal successors, (10705), 3560 states have internal predecessors, (10705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10705 transitions. [2021-07-09 17:25:30,799 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10705 transitions. Word has length 20 [2021-07-09 17:25:30,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:30,799 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10705 transitions. [2021-07-09 17:25:30,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10705 transitions. [2021-07-09 17:25:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:30,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:30,803 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:31,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13540,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:31,022 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1354204688, now seen corresponding path program 279 times [2021-07-09 17:25:31,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:31,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460537620] [2021-07-09 17:25:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:31,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:31,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460537620] [2021-07-09 17:25:31,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460537620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:31,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648235623] [2021-07-09 17:25:31,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:31,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:25:31,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:31,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:31,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:32,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:32,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:32,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:32,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:32,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648235623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:32,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:32,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749665055] [2021-07-09 17:25:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:32,438 INFO L87 Difference]: Start difference. First operand 3561 states and 10705 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:32,824 INFO L93 Difference]: Finished difference Result 3663 states and 10877 transitions. [2021-07-09 17:25:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:32,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:25:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:32,830 INFO L225 Difference]: With dead ends: 3663 [2021-07-09 17:25:32,830 INFO L226 Difference]: Without dead ends: 3648 [2021-07-09 17:25:32,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-07-09 17:25:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 3561. [2021-07-09 17:25:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9985955056179776) internal successors, (10675), 3560 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10675 transitions. [2021-07-09 17:25:32,881 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10675 transitions. Word has length 20 [2021-07-09 17:25:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:32,882 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10675 transitions. [2021-07-09 17:25:32,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10675 transitions. [2021-07-09 17:25:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:32,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:32,885 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:33,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13618,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:33,101 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1797103828, now seen corresponding path program 280 times [2021-07-09 17:25:33,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:33,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378592113] [2021-07-09 17:25:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:33,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:33,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378592113] [2021-07-09 17:25:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378592113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:33,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022728334] [2021-07-09 17:25:33,200 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:33,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:33,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:33,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:33,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:34,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:34,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:34,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:34,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:34,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022728334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:34,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:34,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:34,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853974570] [2021-07-09 17:25:34,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:34,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:34,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:34,476 INFO L87 Difference]: Start difference. First operand 3561 states and 10675 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:34,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:34,988 INFO L93 Difference]: Finished difference Result 3677 states and 10845 transitions. [2021-07-09 17:25:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:34,993 INFO L225 Difference]: With dead ends: 3677 [2021-07-09 17:25:34,994 INFO L226 Difference]: Without dead ends: 3660 [2021-07-09 17:25:34,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:34,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-07-09 17:25:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 3561. [2021-07-09 17:25:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-07-09 17:25:35,046 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-07-09 17:25:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:35,046 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-07-09 17:25:35,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-07-09 17:25:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:35,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:35,050 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:35,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13787 [2021-07-09 17:25:35,265 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1652892016, now seen corresponding path program 281 times [2021-07-09 17:25:35,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:35,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953556007] [2021-07-09 17:25:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:35,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953556007] [2021-07-09 17:25:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953556007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116462109] [2021-07-09 17:25:35,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:35,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:25:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:35,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:35,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:35,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:35,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:37,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:37,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:37,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:37,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116462109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:37,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338460062] [2021-07-09 17:25:37,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:37,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:37,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:37,099 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:37,578 INFO L93 Difference]: Finished difference Result 3666 states and 10779 transitions. [2021-07-09 17:25:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:25:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:37,584 INFO L225 Difference]: With dead ends: 3666 [2021-07-09 17:25:37,584 INFO L226 Difference]: Without dead ends: 3661 [2021-07-09 17:25:37,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-07-09 17:25:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 3561. [2021-07-09 17:25:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 2.9856741573033707) internal successors, (10629), 3560 states have internal predecessors, (10629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 10629 transitions. [2021-07-09 17:25:37,637 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 10629 transitions. Word has length 20 [2021-07-09 17:25:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:37,637 INFO L482 AbstractCegarLoop]: Abstraction has 3561 states and 10629 transitions. [2021-07-09 17:25:37,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 10629 transitions. [2021-07-09 17:25:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:37,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:37,641 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:37,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13950 [2021-07-09 17:25:37,857 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2136066476, now seen corresponding path program 282 times [2021-07-09 17:25:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:37,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754820229] [2021-07-09 17:25:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:37,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754820229] [2021-07-09 17:25:37,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754820229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623584380] [2021-07-09 17:25:37,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:37,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:25:37,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:37,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:38,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:38,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:38,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:38,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:38,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623584380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:38,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:38,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717504955] [2021-07-09 17:25:38,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:38,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:38,599 INFO L87 Difference]: Start difference. First operand 3561 states and 10629 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:39,065 INFO L93 Difference]: Finished difference Result 3633 states and 10776 transitions. [2021-07-09 17:25:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:25:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:25:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:39,070 INFO L225 Difference]: With dead ends: 3633 [2021-07-09 17:25:39,070 INFO L226 Difference]: Without dead ends: 3623 [2021-07-09 17:25:39,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:25:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-07-09 17:25:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3565. [2021-07-09 17:25:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.98625140291807) internal successors, (10643), 3564 states have internal predecessors, (10643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10643 transitions. [2021-07-09 17:25:39,119 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10643 transitions. Word has length 20 [2021-07-09 17:25:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:39,119 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10643 transitions. [2021-07-09 17:25:39,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10643 transitions. [2021-07-09 17:25:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:39,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:39,123 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:39,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14171,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:39,328 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:39,328 INFO L82 PathProgramCache]: Analyzing trace with hash -106398646, now seen corresponding path program 283 times [2021-07-09 17:25:39,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:39,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74534644] [2021-07-09 17:25:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:39,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74534644] [2021-07-09 17:25:39,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74534644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:39,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019523386] [2021-07-09 17:25:39,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:39,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:39,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:40,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:40,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:40,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:40,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:40,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019523386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:40,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:40,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:40,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095120565] [2021-07-09 17:25:40,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:40,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:40,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:40,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:40,385 INFO L87 Difference]: Start difference. First operand 3565 states and 10643 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:40,873 INFO L93 Difference]: Finished difference Result 3684 states and 10816 transitions. [2021-07-09 17:25:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:25:40,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:40,880 INFO L225 Difference]: With dead ends: 3684 [2021-07-09 17:25:40,880 INFO L226 Difference]: Without dead ends: 3665 [2021-07-09 17:25:40,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2021-07-09 17:25:40,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3565. [2021-07-09 17:25:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-07-09 17:25:40,930 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-07-09 17:25:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:40,930 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-07-09 17:25:40,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-07-09 17:25:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:40,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:40,933 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:41,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14254,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,150 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:41,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1154063090, now seen corresponding path program 284 times [2021-07-09 17:25:41,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:41,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295231363] [2021-07-09 17:25:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:41,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295231363] [2021-07-09 17:25:41,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295231363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:41,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818750192] [2021-07-09 17:25:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:41,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:41,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:42,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:42,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:42,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:42,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818750192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:42,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:42,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532451691] [2021-07-09 17:25:42,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:42,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:42,296 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:42,598 INFO L93 Difference]: Finished difference Result 3609 states and 10719 transitions. [2021-07-09 17:25:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:25:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:25:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:42,603 INFO L225 Difference]: With dead ends: 3609 [2021-07-09 17:25:42,603 INFO L226 Difference]: Without dead ends: 3604 [2021-07-09 17:25:42,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-07-09 17:25:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3565. [2021-07-09 17:25:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-07-09 17:25:42,656 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-07-09 17:25:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:42,656 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-07-09 17:25:42,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-07-09 17:25:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:42,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:42,660 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:42,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14391,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:42,869 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:42,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1415424748, now seen corresponding path program 285 times [2021-07-09 17:25:42,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:42,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502578997] [2021-07-09 17:25:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:42,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502578997] [2021-07-09 17:25:42,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502578997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737124497] [2021-07-09 17:25:42,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:43,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:43,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:43,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:43,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:43,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737124497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816853974] [2021-07-09 17:25:43,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:43,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:43,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:43,731 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:44,091 INFO L93 Difference]: Finished difference Result 3624 states and 10731 transitions. [2021-07-09 17:25:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:44,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:25:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:44,096 INFO L225 Difference]: With dead ends: 3624 [2021-07-09 17:25:44,096 INFO L226 Difference]: Without dead ends: 3619 [2021-07-09 17:25:44,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-07-09 17:25:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3565. [2021-07-09 17:25:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3565 states, 3564 states have (on average 2.9812008978675646) internal successors, (10625), 3564 states have internal predecessors, (10625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 10625 transitions. [2021-07-09 17:25:44,146 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 10625 transitions. Word has length 20 [2021-07-09 17:25:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:44,146 INFO L482 AbstractCegarLoop]: Abstraction has 3565 states and 10625 transitions. [2021-07-09 17:25:44,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 10625 transitions. [2021-07-09 17:25:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:44,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:44,150 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:44,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14560 [2021-07-09 17:25:44,365 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash -220599381, now seen corresponding path program 286 times [2021-07-09 17:25:44,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:44,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234479322] [2021-07-09 17:25:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:44,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234479322] [2021-07-09 17:25:44,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234479322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477715251] [2021-07-09 17:25:44,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:44,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:44,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:44,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:44,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477715251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:44,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:25:44,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087835570] [2021-07-09 17:25:44,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:25:44,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:44,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:25:44,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:25:44,457 INFO L87 Difference]: Start difference. First operand 3565 states and 10625 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:44,545 INFO L93 Difference]: Finished difference Result 4289 states and 12569 transitions. [2021-07-09 17:25:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:25:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:44,552 INFO L225 Difference]: With dead ends: 4289 [2021-07-09 17:25:44,552 INFO L226 Difference]: Without dead ends: 4289 [2021-07-09 17:25:44,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:25:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-07-09 17:25:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3974. [2021-07-09 17:25:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-07-09 17:25:44,620 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-07-09 17:25:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:44,620 INFO L482 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-07-09 17:25:44,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-07-09 17:25:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:44,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:44,625 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:44,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14660,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:44,845 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1390137552, now seen corresponding path program 287 times [2021-07-09 17:25:44,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:44,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162814745] [2021-07-09 17:25:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:44,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:44,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162814745] [2021-07-09 17:25:44,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162814745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:44,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899441266] [2021-07-09 17:25:44,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:44,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:25:44,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:45,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:46,583 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 208 [2021-07-09 17:25:46,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:46,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:46,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:46,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899441266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:46,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:46,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:46,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665050335] [2021-07-09 17:25:46,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:46,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:46,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:46,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:46,824 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:47,153 INFO L93 Difference]: Finished difference Result 4051 states and 12046 transitions. [2021-07-09 17:25:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:25:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:47,158 INFO L225 Difference]: With dead ends: 4051 [2021-07-09 17:25:47,158 INFO L226 Difference]: Without dead ends: 4046 [2021-07-09 17:25:47,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-07-09 17:25:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3974. [2021-07-09 17:25:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.9974830103196575) internal successors, (11909), 3973 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 11909 transitions. [2021-07-09 17:25:47,220 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 11909 transitions. Word has length 20 [2021-07-09 17:25:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:47,220 INFO L482 AbstractCegarLoop]: Abstraction has 3974 states and 11909 transitions. [2021-07-09 17:25:47,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 11909 transitions. [2021-07-09 17:25:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:47,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:47,225 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:47,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14661,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,443 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2013508113, now seen corresponding path program 288 times [2021-07-09 17:25:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:47,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668368381] [2021-07-09 17:25:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:47,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:47,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668368381] [2021-07-09 17:25:47,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668368381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941901283] [2021-07-09 17:25:47,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:25:47,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:47,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:47,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941901283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:47,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:47,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:25:47,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970195421] [2021-07-09 17:25:47,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:25:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:25:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:47,543 INFO L87 Difference]: Start difference. First operand 3974 states and 11909 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:47,671 INFO L93 Difference]: Finished difference Result 4435 states and 12955 transitions. [2021-07-09 17:25:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:25:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:47,679 INFO L225 Difference]: With dead ends: 4435 [2021-07-09 17:25:47,680 INFO L226 Difference]: Without dead ends: 4435 [2021-07-09 17:25:47,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:25:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-07-09 17:25:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3990. [2021-07-09 17:25:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-07-09 17:25:47,744 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-07-09 17:25:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:47,744 INFO L482 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-07-09 17:25:47,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-07-09 17:25:47,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:47,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:47,748 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:47,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14891,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:47,965 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1831744364, now seen corresponding path program 289 times [2021-07-09 17:25:47,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:47,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203744187] [2021-07-09 17:25:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:48,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:48,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203744187] [2021-07-09 17:25:48,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203744187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:48,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39179160] [2021-07-09 17:25:48,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:48,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:48,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:48,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:49,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:49,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:49,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:49,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:49,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39179160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:49,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 17:25:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399557778] [2021-07-09 17:25:49,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:25:49,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:25:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:25:49,033 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:49,470 INFO L93 Difference]: Finished difference Result 4136 states and 12254 transitions. [2021-07-09 17:25:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:49,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 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 20 [2021-07-09 17:25:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:49,476 INFO L225 Difference]: With dead ends: 4136 [2021-07-09 17:25:49,476 INFO L226 Difference]: Without dead ends: 4131 [2021-07-09 17:25:49,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:25:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-07-09 17:25:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3990. [2021-07-09 17:25:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 3989 states have (on average 2.995487590874906) internal successors, (11949), 3989 states have internal predecessors, (11949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 11949 transitions. [2021-07-09 17:25:49,578 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 11949 transitions. Word has length 20 [2021-07-09 17:25:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:49,578 INFO L482 AbstractCegarLoop]: Abstraction has 3990 states and 11949 transitions. [2021-07-09 17:25:49,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 11949 transitions. [2021-07-09 17:25:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:49,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:49,582 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:49,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14892,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:49,797 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:49,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1743603605, now seen corresponding path program 290 times [2021-07-09 17:25:49,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:49,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489484651] [2021-07-09 17:25:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:49,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:49,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489484651] [2021-07-09 17:25:49,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489484651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120176116] [2021-07-09 17:25:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:49,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:49,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:49,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120176116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:49,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:49,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:25:49,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422797404] [2021-07-09 17:25:49,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:25:49,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:25:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:25:49,905 INFO L87 Difference]: Start difference. First operand 3990 states and 11949 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:50,032 INFO L93 Difference]: Finished difference Result 5817 states and 17279 transitions. [2021-07-09 17:25:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:25:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:50,040 INFO L225 Difference]: With dead ends: 5817 [2021-07-09 17:25:50,040 INFO L226 Difference]: Without dead ends: 5817 [2021-07-09 17:25:50,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2021-07-09 17:25:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5550. [2021-07-09 17:25:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.0131555235177507) internal successors, (16720), 5549 states have internal predecessors, (16720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16720 transitions. [2021-07-09 17:25:50,131 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16720 transitions. Word has length 20 [2021-07-09 17:25:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:50,131 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 16720 transitions. [2021-07-09 17:25:50,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:50,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16720 transitions. [2021-07-09 17:25:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:50,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:50,136 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:50,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15037,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:50,352 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1369131344, now seen corresponding path program 291 times [2021-07-09 17:25:50,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:50,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740431161] [2021-07-09 17:25:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:50,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740431161] [2021-07-09 17:25:50,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740431161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648159412] [2021-07-09 17:25:50,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:50,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:25:50,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:50,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:50,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:50,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:51,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:51,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:51,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:51,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:51,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648159412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:51,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:51,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:51,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472959795] [2021-07-09 17:25:51,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:51,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:51,091 INFO L87 Difference]: Start difference. First operand 5550 states and 16720 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:51,631 INFO L93 Difference]: Finished difference Result 5762 states and 17201 transitions. [2021-07-09 17:25:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:25:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:51,639 INFO L225 Difference]: With dead ends: 5762 [2021-07-09 17:25:51,639 INFO L226 Difference]: Without dead ends: 5747 [2021-07-09 17:25:51,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:25:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-07-09 17:25:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5546. [2021-07-09 17:25:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5546 states, 5545 states have (on average 3.012082957619477) internal successors, (16702), 5545 states have internal predecessors, (16702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5546 states to 5546 states and 16702 transitions. [2021-07-09 17:25:51,821 INFO L78 Accepts]: Start accepts. Automaton has 5546 states and 16702 transitions. Word has length 20 [2021-07-09 17:25:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:51,821 INFO L482 AbstractCegarLoop]: Abstraction has 5546 states and 16702 transitions. [2021-07-09 17:25:51,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5546 states and 16702 transitions. [2021-07-09 17:25:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:51,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:51,827 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:52,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15038 [2021-07-09 17:25:52,044 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2045017425, now seen corresponding path program 292 times [2021-07-09 17:25:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:52,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512953725] [2021-07-09 17:25:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:52,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:52,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512953725] [2021-07-09 17:25:52,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512953725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:52,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614872189] [2021-07-09 17:25:52,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:52,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:52,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:52,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:52,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614872189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:52,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:52,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:25:52,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753906032] [2021-07-09 17:25:52,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:52,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:52,167 INFO L87 Difference]: Start difference. First operand 5546 states and 16702 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:52,321 INFO L93 Difference]: Finished difference Result 5777 states and 17109 transitions. [2021-07-09 17:25:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:25:52,321 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:52,331 INFO L225 Difference]: With dead ends: 5777 [2021-07-09 17:25:52,332 INFO L226 Difference]: Without dead ends: 5777 [2021-07-09 17:25:52,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:25:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-07-09 17:25:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5282. [2021-07-09 17:25:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-07-09 17:25:52,459 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-07-09 17:25:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:52,460 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-07-09 17:25:52,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-07-09 17:25:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:52,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:52,467 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:52,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15118 [2021-07-09 17:25:52,674 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1812030484, now seen corresponding path program 293 times [2021-07-09 17:25:52,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:52,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926303165] [2021-07-09 17:25:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:52,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:52,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926303165] [2021-07-09 17:25:52,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926303165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:52,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782428619] [2021-07-09 17:25:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:52,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:25:52,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:52,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:52,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:53,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:53,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:53,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:53,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:53,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782428619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:53,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:53,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 17:25:53,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99893716] [2021-07-09 17:25:53,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:25:53,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:53,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:25:53,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:25:53,481 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:53,899 INFO L93 Difference]: Finished difference Result 5451 states and 16210 transitions. [2021-07-09 17:25:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:25:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 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 20 [2021-07-09 17:25:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:53,908 INFO L225 Difference]: With dead ends: 5451 [2021-07-09 17:25:53,909 INFO L226 Difference]: Without dead ends: 5446 [2021-07-09 17:25:53,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-07-09 17:25:53,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 5282. [2021-07-09 17:25:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 2.9988638515432684) internal successors, (15837), 5281 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 15837 transitions. [2021-07-09 17:25:54,003 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 15837 transitions. Word has length 20 [2021-07-09 17:25:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:54,003 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 15837 transitions. [2021-07-09 17:25:54,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 15837 transitions. [2021-07-09 17:25:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:54,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:54,009 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:54,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15119 [2021-07-09 17:25:54,226 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash -766814933, now seen corresponding path program 294 times [2021-07-09 17:25:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:54,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390288712] [2021-07-09 17:25:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:54,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:54,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390288712] [2021-07-09 17:25:54,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390288712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:54,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493076604] [2021-07-09 17:25:54,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:54,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:25:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:54,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:54,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:25:54,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493076604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:54,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:54,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:25:54,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162554530] [2021-07-09 17:25:54,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:25:54,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:54,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:25:54,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:25:54,328 INFO L87 Difference]: Start difference. First operand 5282 states and 15837 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:54,418 INFO L93 Difference]: Finished difference Result 5596 states and 16637 transitions. [2021-07-09 17:25:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:25:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:54,427 INFO L225 Difference]: With dead ends: 5596 [2021-07-09 17:25:54,427 INFO L226 Difference]: Without dead ends: 5596 [2021-07-09 17:25:54,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:25:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5596 states. [2021-07-09 17:25:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5596 to 5450. [2021-07-09 17:25:54,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.998715360616627) internal successors, (16340), 5449 states have internal predecessors, (16340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16340 transitions. [2021-07-09 17:25:54,523 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16340 transitions. Word has length 20 [2021-07-09 17:25:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:54,523 INFO L482 AbstractCegarLoop]: Abstraction has 5450 states and 16340 transitions. [2021-07-09 17:25:54,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16340 transitions. [2021-07-09 17:25:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:54,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:54,529 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:54,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15221,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:54,746 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1637965360, now seen corresponding path program 295 times [2021-07-09 17:25:54,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:54,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014347014] [2021-07-09 17:25:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:54,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:54,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014347014] [2021-07-09 17:25:54,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014347014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:54,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586968562] [2021-07-09 17:25:54,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:55,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:55,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:55,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:55,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:55,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586968562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:55,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:55,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340976615] [2021-07-09 17:25:55,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:55,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:55,672 INFO L87 Difference]: Start difference. First operand 5450 states and 16340 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:56,098 INFO L93 Difference]: Finished difference Result 5569 states and 16513 transitions. [2021-07-09 17:25:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:25:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:56,107 INFO L225 Difference]: With dead ends: 5569 [2021-07-09 17:25:56,107 INFO L226 Difference]: Without dead ends: 5550 [2021-07-09 17:25:56,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:25:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-07-09 17:25:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5450. [2021-07-09 17:25:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5450 states, 5449 states have (on average 2.9981648008808954) internal successors, (16337), 5449 states have internal predecessors, (16337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5450 states to 5450 states and 16337 transitions. [2021-07-09 17:25:56,200 INFO L78 Accepts]: Start accepts. Automaton has 5450 states and 16337 transitions. Word has length 20 [2021-07-09 17:25:56,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:56,200 INFO L482 AbstractCegarLoop]: Abstraction has 5450 states and 16337 transitions. [2021-07-09 17:25:56,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5450 states and 16337 transitions. [2021-07-09 17:25:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:56,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:56,206 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:56,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15222 [2021-07-09 17:25:56,423 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:56,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2034272111, now seen corresponding path program 296 times [2021-07-09 17:25:56,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:56,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892345896] [2021-07-09 17:25:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:56,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892345896] [2021-07-09 17:25:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892345896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467567382] [2021-07-09 17:25:56,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:56,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:25:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:56,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467567382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:56,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:56,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:25:56,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233320536] [2021-07-09 17:25:56,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:56,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:56,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:56,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:56,566 INFO L87 Difference]: Start difference. First operand 5450 states and 16337 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:56,744 INFO L93 Difference]: Finished difference Result 5644 states and 16739 transitions. [2021-07-09 17:25:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:25:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:56,751 INFO L225 Difference]: With dead ends: 5644 [2021-07-09 17:25:56,752 INFO L226 Difference]: Without dead ends: 5644 [2021-07-09 17:25:56,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5644 states. [2021-07-09 17:25:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5644 to 5491. [2021-07-09 17:25:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5490 states have (on average 2.9981785063752278) internal successors, (16460), 5490 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 16460 transitions. [2021-07-09 17:25:56,825 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 16460 transitions. Word has length 20 [2021-07-09 17:25:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:56,825 INFO L482 AbstractCegarLoop]: Abstraction has 5491 states and 16460 transitions. [2021-07-09 17:25:56,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 16460 transitions. [2021-07-09 17:25:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:56,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:56,831 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:57,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15320,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:57,047 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1213654124, now seen corresponding path program 297 times [2021-07-09 17:25:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:57,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994725026] [2021-07-09 17:25:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:57,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994725026] [2021-07-09 17:25:57,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994725026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:57,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541662149] [2021-07-09 17:25:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:25:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:25:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:57,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:57,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-09 17:25:58,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:25:58,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:25:58,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-09 17:25:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:58,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541662149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:58,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:58,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 17:25:58,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444137620] [2021-07-09 17:25:58,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:25:58,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:25:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:25:58,147 INFO L87 Difference]: Start difference. First operand 5491 states and 16460 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:58,695 INFO L93 Difference]: Finished difference Result 7043 states and 21060 transitions. [2021-07-09 17:25:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:25:58,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 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 20 [2021-07-09 17:25:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:58,705 INFO L225 Difference]: With dead ends: 7043 [2021-07-09 17:25:58,705 INFO L226 Difference]: Without dead ends: 7038 [2021-07-09 17:25:58,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:25:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7038 states. [2021-07-09 17:25:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7038 to 5493. [2021-07-09 17:25:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.997632920611799) internal successors, (16463), 5492 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 16463 transitions. [2021-07-09 17:25:58,801 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 16463 transitions. Word has length 20 [2021-07-09 17:25:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:58,801 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 16463 transitions. [2021-07-09 17:25:58,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 16463 transitions. [2021-07-09 17:25:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:25:58,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:58,813 INFO L508 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:59,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15321,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:59,030 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1624228331, now seen corresponding path program 298 times [2021-07-09 17:25:59,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:59,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63252925] [2021-07-09 17:25:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:59,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63252925] [2021-07-09 17:25:59,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63252925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577301171] [2021-07-09 17:25:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:59,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:25:59,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:59,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:25:59,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577301171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:59,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:25:59,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908978905] [2021-07-09 17:25:59,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:25:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:25:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:25:59,161 INFO L87 Difference]: Start difference. First operand 5493 states and 16463 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:59,379 INFO L93 Difference]: Finished difference Result 5812 states and 17186 transitions. [2021-07-09 17:25:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:25:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:25:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:25:59,387 INFO L225 Difference]: With dead ends: 5812 [2021-07-09 17:25:59,387 INFO L226 Difference]: Without dead ends: 5812 [2021-07-09 17:25:59,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:25:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-07-09 17:25:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5528. [2021-07-09 17:25:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5528 states, 5527 states have (on average 2.99764791025873) internal successors, (16568), 5527 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 16568 transitions. [2021-07-09 17:25:59,461 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 16568 transitions. Word has length 20 [2021-07-09 17:25:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:25:59,461 INFO L482 AbstractCegarLoop]: Abstraction has 5528 states and 16568 transitions. [2021-07-09 17:25:59,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 16568 transitions. [2021-07-09 17:25:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:25:59,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:25:59,465 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:25:59,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15473,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:59,682 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:25:59,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:25:59,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1322257352, now seen corresponding path program 299 times [2021-07-09 17:25:59,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:25:59,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783881742] [2021-07-09 17:25:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:25:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:25:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:25:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783881742] [2021-07-09 17:25:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783881742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658558657] [2021-07-09 17:25:59,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:25:59,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:25:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:25:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:25:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:25:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:25:59,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658558657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:25:59,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:25:59,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:25:59,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844739859] [2021-07-09 17:25:59,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:25:59,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:25:59,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:25:59,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:25:59,847 INFO L87 Difference]: Start difference. First operand 5528 states and 16568 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:25:59,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:25:59,993 INFO L93 Difference]: Finished difference Result 5709 states and 16848 transitions. [2021-07-09 17:25:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:25:59,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:25:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:00,001 INFO L225 Difference]: With dead ends: 5709 [2021-07-09 17:26:00,001 INFO L226 Difference]: Without dead ends: 5703 [2021-07-09 17:26:00,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:00,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-07-09 17:26:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5519. [2021-07-09 17:26:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5519 states, 5518 states have (on average 2.996737948532077) internal successors, (16536), 5518 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 16536 transitions. [2021-07-09 17:26:00,082 INFO L78 Accepts]: Start accepts. Automaton has 5519 states and 16536 transitions. Word has length 21 [2021-07-09 17:26:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:00,083 INFO L482 AbstractCegarLoop]: Abstraction has 5519 states and 16536 transitions. [2021-07-09 17:26:00,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5519 states and 16536 transitions. [2021-07-09 17:26:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:00,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:00,161 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:00,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15474,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:00,378 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1554817325, now seen corresponding path program 300 times [2021-07-09 17:26:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:00,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809719038] [2021-07-09 17:26:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:00,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809719038] [2021-07-09 17:26:00,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809719038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081034082] [2021-07-09 17:26:00,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:00,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:00,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:00,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081034082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:00,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:00,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:00,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279836444] [2021-07-09 17:26:00,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:00,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:00,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:00,503 INFO L87 Difference]: Start difference. First operand 5519 states and 16536 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:00,726 INFO L93 Difference]: Finished difference Result 5835 states and 17177 transitions. [2021-07-09 17:26:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:26:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:00,735 INFO L225 Difference]: With dead ends: 5835 [2021-07-09 17:26:00,735 INFO L226 Difference]: Without dead ends: 5826 [2021-07-09 17:26:00,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:26:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-07-09 17:26:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5556. [2021-07-09 17:26:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.996759675967597) internal successors, (16647), 5555 states have internal predecessors, (16647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16647 transitions. [2021-07-09 17:26:00,815 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16647 transitions. Word has length 21 [2021-07-09 17:26:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:00,815 INFO L482 AbstractCegarLoop]: Abstraction has 5556 states and 16647 transitions. [2021-07-09 17:26:00,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16647 transitions. [2021-07-09 17:26:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:00,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:00,821 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:01,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15475 [2021-07-09 17:26:01,037 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:01,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:01,037 INFO L82 PathProgramCache]: Analyzing trace with hash -395399322, now seen corresponding path program 301 times [2021-07-09 17:26:01,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:01,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600268186] [2021-07-09 17:26:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:01,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600268186] [2021-07-09 17:26:01,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600268186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221318128] [2021-07-09 17:26:01,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:01,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221318128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:01,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:26:01,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356803950] [2021-07-09 17:26:01,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:01,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:01,152 INFO L87 Difference]: Start difference. First operand 5556 states and 16647 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:01,284 INFO L93 Difference]: Finished difference Result 5621 states and 16745 transitions. [2021-07-09 17:26:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:01,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:01,291 INFO L225 Difference]: With dead ends: 5621 [2021-07-09 17:26:01,291 INFO L226 Difference]: Without dead ends: 5617 [2021-07-09 17:26:01,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-07-09 17:26:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5556. [2021-07-09 17:26:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 2.9962196219621964) internal successors, (16644), 5555 states have internal predecessors, (16644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 16644 transitions. [2021-07-09 17:26:01,363 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 16644 transitions. Word has length 21 [2021-07-09 17:26:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 5556 states and 16644 transitions. [2021-07-09 17:26:01,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 16644 transitions. [2021-07-09 17:26:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:01,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:01,368 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:01,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15476,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,584 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2031423451, now seen corresponding path program 302 times [2021-07-09 17:26:01,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:01,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810381205] [2021-07-09 17:26:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:01,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810381205] [2021-07-09 17:26:01,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810381205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67282295] [2021-07-09 17:26:01,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:01,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:01,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:01,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:01,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67282295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:01,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:01,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:26:01,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063697823] [2021-07-09 17:26:01,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:01,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:01,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:01,687 INFO L87 Difference]: Start difference. First operand 5556 states and 16644 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:01,758 INFO L93 Difference]: Finished difference Result 5973 states and 17563 transitions. [2021-07-09 17:26:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:01,766 INFO L225 Difference]: With dead ends: 5973 [2021-07-09 17:26:01,766 INFO L226 Difference]: Without dead ends: 5973 [2021-07-09 17:26:01,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-07-09 17:26:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5549. [2021-07-09 17:26:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994953136265321) internal successors, (16616), 5548 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16616 transitions. [2021-07-09 17:26:01,851 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16616 transitions. Word has length 21 [2021-07-09 17:26:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:01,851 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 16616 transitions. [2021-07-09 17:26:01,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16616 transitions. [2021-07-09 17:26:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:01,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:01,856 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:02,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15477,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:02,072 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -771235884, now seen corresponding path program 303 times [2021-07-09 17:26:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:02,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230571650] [2021-07-09 17:26:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230571650] [2021-07-09 17:26:02,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230571650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618510157] [2021-07-09 17:26:02,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:02,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:26:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618510157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:02,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414673612] [2021-07-09 17:26:02,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:02,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:02,173 INFO L87 Difference]: Start difference. First operand 5549 states and 16616 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:02,286 INFO L93 Difference]: Finished difference Result 5638 states and 16779 transitions. [2021-07-09 17:26:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:02,294 INFO L225 Difference]: With dead ends: 5638 [2021-07-09 17:26:02,295 INFO L226 Difference]: Without dead ends: 5634 [2021-07-09 17:26:02,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-07-09 17:26:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 5549. [2021-07-09 17:26:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-07-09 17:26:02,385 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-07-09 17:26:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:02,385 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-07-09 17:26:02,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-07-09 17:26:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:02,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:02,391 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:02,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15478 [2021-07-09 17:26:02,608 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1662557515, now seen corresponding path program 304 times [2021-07-09 17:26:02,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:02,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406580509] [2021-07-09 17:26:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:02,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406580509] [2021-07-09 17:26:02,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406580509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350830806] [2021-07-09 17:26:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:02,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:02,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:02,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:02,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:02,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350830806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:02,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:02,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:02,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811282122] [2021-07-09 17:26:02,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:02,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:02,720 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:02,803 INFO L93 Difference]: Finished difference Result 6298 states and 18497 transitions. [2021-07-09 17:26:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:02,814 INFO L225 Difference]: With dead ends: 6298 [2021-07-09 17:26:02,814 INFO L226 Difference]: Without dead ends: 6298 [2021-07-09 17:26:02,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6298 states. [2021-07-09 17:26:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6298 to 5549. [2021-07-09 17:26:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 2.994592645998558) internal successors, (16614), 5548 states have internal predecessors, (16614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 16614 transitions. [2021-07-09 17:26:02,924 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 16614 transitions. Word has length 21 [2021-07-09 17:26:02,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:02,924 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 16614 transitions. [2021-07-09 17:26:02,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:02,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 16614 transitions. [2021-07-09 17:26:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:02,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:02,930 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:03,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15479 [2021-07-09 17:26:03,148 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1771892424, now seen corresponding path program 305 times [2021-07-09 17:26:03,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:03,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295936406] [2021-07-09 17:26:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:03,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:03,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295936406] [2021-07-09 17:26:03,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295936406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557332609] [2021-07-09 17:26:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:03,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:03,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557332609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:03,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733483254] [2021-07-09 17:26:03,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:03,257 INFO L87 Difference]: Start difference. First operand 5549 states and 16614 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:03,345 INFO L93 Difference]: Finished difference Result 5861 states and 17231 transitions. [2021-07-09 17:26:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:03,357 INFO L225 Difference]: With dead ends: 5861 [2021-07-09 17:26:03,357 INFO L226 Difference]: Without dead ends: 5859 [2021-07-09 17:26:03,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5859 states. [2021-07-09 17:26:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5859 to 5592. [2021-07-09 17:26:03,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 5591 states have (on average 2.996959399034162) internal successors, (16756), 5591 states have internal predecessors, (16756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 16756 transitions. [2021-07-09 17:26:03,451 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 16756 transitions. Word has length 21 [2021-07-09 17:26:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:03,451 INFO L482 AbstractCegarLoop]: Abstraction has 5592 states and 16756 transitions. [2021-07-09 17:26:03,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 16756 transitions. [2021-07-09 17:26:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:03,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:03,495 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:03,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15480 [2021-07-09 17:26:03,701 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash 994742825, now seen corresponding path program 306 times [2021-07-09 17:26:03,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:03,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300229332] [2021-07-09 17:26:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:03,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:03,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300229332] [2021-07-09 17:26:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300229332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219437885] [2021-07-09 17:26:03,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:03,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:03,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:03,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219437885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:03,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:03,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:03,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798989952] [2021-07-09 17:26:03,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:03,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:03,794 INFO L87 Difference]: Start difference. First operand 5592 states and 16756 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:03,919 INFO L93 Difference]: Finished difference Result 5825 states and 17153 transitions. [2021-07-09 17:26:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:03,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:03,929 INFO L225 Difference]: With dead ends: 5825 [2021-07-09 17:26:03,929 INFO L226 Difference]: Without dead ends: 5823 [2021-07-09 17:26:03,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:03,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2021-07-09 17:26:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5602. [2021-07-09 17:26:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 5601 states have (on average 2.997143367255847) internal successors, (16787), 5601 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 16787 transitions. [2021-07-09 17:26:04,013 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 16787 transitions. Word has length 21 [2021-07-09 17:26:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:04,013 INFO L482 AbstractCegarLoop]: Abstraction has 5602 states and 16787 transitions. [2021-07-09 17:26:04,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 16787 transitions. [2021-07-09 17:26:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:04,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:04,018 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:04,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15481,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,234 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1535817962, now seen corresponding path program 307 times [2021-07-09 17:26:04,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:04,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622218044] [2021-07-09 17:26:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:04,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622218044] [2021-07-09 17:26:04,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622218044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171535263] [2021-07-09 17:26:04,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171535263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:04,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453891358] [2021-07-09 17:26:04,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:04,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:04,339 INFO L87 Difference]: Start difference. First operand 5602 states and 16787 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:04,471 INFO L93 Difference]: Finished difference Result 5786 states and 17096 transitions. [2021-07-09 17:26:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,479 INFO L225 Difference]: With dead ends: 5786 [2021-07-09 17:26:04,479 INFO L226 Difference]: Without dead ends: 5778 [2021-07-09 17:26:04,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-07-09 17:26:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 5570. [2021-07-09 17:26:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 2.995151732806608) internal successors, (16680), 5569 states have internal predecessors, (16680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 16680 transitions. [2021-07-09 17:26:04,570 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 16680 transitions. Word has length 21 [2021-07-09 17:26:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:04,571 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 16680 transitions. [2021-07-09 17:26:04,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 16680 transitions. [2021-07-09 17:26:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:04,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:04,576 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:04,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15482 [2021-07-09 17:26:04,777 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash 644496331, now seen corresponding path program 308 times [2021-07-09 17:26:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:04,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079996352] [2021-07-09 17:26:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:04,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079996352] [2021-07-09 17:26:04,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079996352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545114179] [2021-07-09 17:26:04,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:04,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:04,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:04,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:04,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545114179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:04,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:04,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:04,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525979621] [2021-07-09 17:26:04,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:04,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:04,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:04,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:04,883 INFO L87 Difference]: Start difference. First operand 5570 states and 16680 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:04,962 INFO L93 Difference]: Finished difference Result 6267 states and 18410 transitions. [2021-07-09 17:26:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:04,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:04,971 INFO L225 Difference]: With dead ends: 6267 [2021-07-09 17:26:04,971 INFO L226 Difference]: Without dead ends: 6267 [2021-07-09 17:26:04,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6267 states. [2021-07-09 17:26:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6267 to 5560. [2021-07-09 17:26:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.99388379204893) internal successors, (16643), 5559 states have internal predecessors, (16643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16643 transitions. [2021-07-09 17:26:05,055 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16643 transitions. Word has length 21 [2021-07-09 17:26:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,055 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 16643 transitions. [2021-07-09 17:26:05,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16643 transitions. [2021-07-09 17:26:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:05,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,060 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15483,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,277 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash 462732582, now seen corresponding path program 309 times [2021-07-09 17:26:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568712656] [2021-07-09 17:26:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568712656] [2021-07-09 17:26:05,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568712656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371439609] [2021-07-09 17:26:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:26:05,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:05,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371439609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:05,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330609513] [2021-07-09 17:26:05,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:05,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:05,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:05,396 INFO L87 Difference]: Start difference. First operand 5560 states and 16643 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:05,563 INFO L93 Difference]: Finished difference Result 5734 states and 16945 transitions. [2021-07-09 17:26:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:05,571 INFO L225 Difference]: With dead ends: 5734 [2021-07-09 17:26:05,572 INFO L226 Difference]: Without dead ends: 5728 [2021-07-09 17:26:05,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5728 states. [2021-07-09 17:26:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5728 to 5560. [2021-07-09 17:26:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 2.993344126641482) internal successors, (16640), 5559 states have internal predecessors, (16640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 16640 transitions. [2021-07-09 17:26:05,668 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 16640 transitions. Word has length 21 [2021-07-09 17:26:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:05,668 INFO L482 AbstractCegarLoop]: Abstraction has 5560 states and 16640 transitions. [2021-07-09 17:26:05,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 16640 transitions. [2021-07-09 17:26:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:05,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:05,673 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:05,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15484 [2021-07-09 17:26:05,890 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1182351909, now seen corresponding path program 310 times [2021-07-09 17:26:05,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:05,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449827649] [2021-07-09 17:26:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:05,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:05,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449827649] [2021-07-09 17:26:05,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449827649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:05,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276583137] [2021-07-09 17:26:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:05,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:05,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:06,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276583137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:06,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507394503] [2021-07-09 17:26:06,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:06,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:06,006 INFO L87 Difference]: Start difference. First operand 5560 states and 16640 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,121 INFO L93 Difference]: Finished difference Result 6745 states and 19766 transitions. [2021-07-09 17:26:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:06,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,131 INFO L225 Difference]: With dead ends: 6745 [2021-07-09 17:26:06,131 INFO L226 Difference]: Without dead ends: 6745 [2021-07-09 17:26:06,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-07-09 17:26:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 5531. [2021-07-09 17:26:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 5530 states have (on average 2.992405063291139) internal successors, (16548), 5530 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 16548 transitions. [2021-07-09 17:26:06,222 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 16548 transitions. Word has length 21 [2021-07-09 17:26:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,222 INFO L482 AbstractCegarLoop]: Abstraction has 5531 states and 16548 transitions. [2021-07-09 17:26:06,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 16548 transitions. [2021-07-09 17:26:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:06,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,227 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15485,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,433 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 276117618, now seen corresponding path program 311 times [2021-07-09 17:26:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082477064] [2021-07-09 17:26:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:06,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:06,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082477064] [2021-07-09 17:26:06,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082477064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114791018] [2021-07-09 17:26:06,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:06,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:06,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114791018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:06,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:06,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:06,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916943930] [2021-07-09 17:26:06,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:06,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:06,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:06,528 INFO L87 Difference]: Start difference. First operand 5531 states and 16548 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:06,601 INFO L93 Difference]: Finished difference Result 5788 states and 17031 transitions. [2021-07-09 17:26:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:06,610 INFO L225 Difference]: With dead ends: 5788 [2021-07-09 17:26:06,611 INFO L226 Difference]: Without dead ends: 5786 [2021-07-09 17:26:06,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-07-09 17:26:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 5550. [2021-07-09 17:26:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 2.9938727698684446) internal successors, (16613), 5549 states have internal predecessors, (16613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 16613 transitions. [2021-07-09 17:26:06,766 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 16613 transitions. Word has length 21 [2021-07-09 17:26:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:06,767 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 16613 transitions. [2021-07-09 17:26:06,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 16613 transitions. [2021-07-09 17:26:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:06,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:06,773 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:06,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15486,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:06,990 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:06,990 INFO L82 PathProgramCache]: Analyzing trace with hash -501031981, now seen corresponding path program 312 times [2021-07-09 17:26:06,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:06,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144505003] [2021-07-09 17:26:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:07,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144505003] [2021-07-09 17:26:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144505003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845164185] [2021-07-09 17:26:07,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:07,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845164185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:07,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465523644] [2021-07-09 17:26:07,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:07,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:07,090 INFO L87 Difference]: Start difference. First operand 5550 states and 16613 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,208 INFO L93 Difference]: Finished difference Result 5761 states and 16965 transitions. [2021-07-09 17:26:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,216 INFO L225 Difference]: With dead ends: 5761 [2021-07-09 17:26:07,216 INFO L226 Difference]: Without dead ends: 5759 [2021-07-09 17:26:07,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:07,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5759 states. [2021-07-09 17:26:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5759 to 5562. [2021-07-09 17:26:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.994425463046215) internal successors, (16652), 5561 states have internal predecessors, (16652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16652 transitions. [2021-07-09 17:26:07,296 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16652 transitions. Word has length 21 [2021-07-09 17:26:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,296 INFO L482 AbstractCegarLoop]: Abstraction has 5562 states and 16652 transitions. [2021-07-09 17:26:07,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16652 transitions. [2021-07-09 17:26:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:07,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,301 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:07,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15487,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,518 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:07,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1033042224, now seen corresponding path program 313 times [2021-07-09 17:26:07,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:07,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706855442] [2021-07-09 17:26:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706855442] [2021-07-09 17:26:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706855442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589823933] [2021-07-09 17:26:07,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:07,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589823933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:07,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:07,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710497845] [2021-07-09 17:26:07,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:07,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:07,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:07,628 INFO L87 Difference]: Start difference. First operand 5562 states and 16652 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:07,782 INFO L93 Difference]: Finished difference Result 5736 states and 16954 transitions. [2021-07-09 17:26:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:07,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:07,789 INFO L225 Difference]: With dead ends: 5736 [2021-07-09 17:26:07,789 INFO L226 Difference]: Without dead ends: 5730 [2021-07-09 17:26:07,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-07-09 17:26:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5534. [2021-07-09 17:26:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.9942165190674137) internal successors, (16567), 5533 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 16567 transitions. [2021-07-09 17:26:07,867 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 16567 transitions. Word has length 21 [2021-07-09 17:26:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:07,867 INFO L482 AbstractCegarLoop]: Abstraction has 5534 states and 16567 transitions. [2021-07-09 17:26:07,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 16567 transitions. [2021-07-09 17:26:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:07,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:07,872 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:08,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15488,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,088 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash -313422897, now seen corresponding path program 314 times [2021-07-09 17:26:08,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:08,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969525676] [2021-07-09 17:26:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:08,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969525676] [2021-07-09 17:26:08,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969525676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928497163] [2021-07-09 17:26:08,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:08,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928497163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:08,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:08,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344495091] [2021-07-09 17:26:08,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:08,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:08,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:08,198 INFO L87 Difference]: Start difference. First operand 5534 states and 16567 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:08,297 INFO L93 Difference]: Finished difference Result 6490 states and 19040 transitions. [2021-07-09 17:26:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:08,305 INFO L225 Difference]: With dead ends: 6490 [2021-07-09 17:26:08,305 INFO L226 Difference]: Without dead ends: 6490 [2021-07-09 17:26:08,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2021-07-09 17:26:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 5526. [2021-07-09 17:26:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 2.9931221719457013) internal successors, (16537), 5525 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 16537 transitions. [2021-07-09 17:26:08,388 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 16537 transitions. Word has length 21 [2021-07-09 17:26:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:08,388 INFO L482 AbstractCegarLoop]: Abstraction has 5526 states and 16537 transitions. [2021-07-09 17:26:08,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 16537 transitions. [2021-07-09 17:26:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:08,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:08,393 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:08,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15489 [2021-07-09 17:26:08,609 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:08,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 61049364, now seen corresponding path program 315 times [2021-07-09 17:26:08,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:08,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087017635] [2021-07-09 17:26:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087017635] [2021-07-09 17:26:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087017635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188308884] [2021-07-09 17:26:08,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:08,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:26:08,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:08,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188308884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:08,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:08,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381481077] [2021-07-09 17:26:08,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:08,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:08,717 INFO L87 Difference]: Start difference. First operand 5526 states and 16537 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:08,838 INFO L93 Difference]: Finished difference Result 5752 states and 17010 transitions. [2021-07-09 17:26:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:08,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:08,845 INFO L225 Difference]: With dead ends: 5752 [2021-07-09 17:26:08,845 INFO L226 Difference]: Without dead ends: 5744 [2021-07-09 17:26:08,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2021-07-09 17:26:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 5527. [2021-07-09 17:26:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5527 states, 5526 states have (on average 2.9927614911328266) internal successors, (16538), 5526 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 16538 transitions. [2021-07-09 17:26:08,919 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 16538 transitions. Word has length 21 [2021-07-09 17:26:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:08,919 INFO L482 AbstractCegarLoop]: Abstraction has 5527 states and 16538 transitions. [2021-07-09 17:26:08,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 16538 transitions. [2021-07-09 17:26:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:08,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:08,924 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:09,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15490 [2021-07-09 17:26:09,140 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash -819769163, now seen corresponding path program 316 times [2021-07-09 17:26:09,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:09,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862139586] [2021-07-09 17:26:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862139586] [2021-07-09 17:26:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862139586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914058448] [2021-07-09 17:26:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:09,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914058448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:09,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:09,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347850084] [2021-07-09 17:26:09,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:09,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:09,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:09,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:09,254 INFO L87 Difference]: Start difference. First operand 5527 states and 16538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:09,388 INFO L93 Difference]: Finished difference Result 7065 states and 20726 transitions. [2021-07-09 17:26:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:09,398 INFO L225 Difference]: With dead ends: 7065 [2021-07-09 17:26:09,398 INFO L226 Difference]: Without dead ends: 7065 [2021-07-09 17:26:09,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7065 states. [2021-07-09 17:26:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7065 to 5559. [2021-07-09 17:26:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.9899244332493704) internal successors, (16618), 5558 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16618 transitions. [2021-07-09 17:26:09,484 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16618 transitions. Word has length 21 [2021-07-09 17:26:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:09,484 INFO L482 AbstractCegarLoop]: Abstraction has 5559 states and 16618 transitions. [2021-07-09 17:26:09,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16618 transitions. [2021-07-09 17:26:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:09,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:09,489 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:09,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15491,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,705 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2090839484, now seen corresponding path program 317 times [2021-07-09 17:26:09,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:09,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201456140] [2021-07-09 17:26:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201456140] [2021-07-09 17:26:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201456140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39397312] [2021-07-09 17:26:09,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:09,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:09,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39397312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:09,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:09,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:09,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207624889] [2021-07-09 17:26:09,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:09,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:09,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:09,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:09,814 INFO L87 Difference]: Start difference. First operand 5559 states and 16618 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:09,946 INFO L93 Difference]: Finished difference Result 5721 states and 16907 transitions. [2021-07-09 17:26:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:09,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:09,954 INFO L225 Difference]: With dead ends: 5721 [2021-07-09 17:26:09,954 INFO L226 Difference]: Without dead ends: 5713 [2021-07-09 17:26:09,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2021-07-09 17:26:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5559. [2021-07-09 17:26:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5559 states, 5558 states have (on average 2.989564591579705) internal successors, (16616), 5558 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5559 states to 5559 states and 16616 transitions. [2021-07-09 17:26:10,066 INFO L78 Accepts]: Start accepts. Automaton has 5559 states and 16616 transitions. Word has length 21 [2021-07-09 17:26:10,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:10,066 INFO L482 AbstractCegarLoop]: Abstraction has 5559 states and 16616 transitions. [2021-07-09 17:26:10,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5559 states and 16616 transitions. [2021-07-09 17:26:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:10,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:10,071 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:10,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15492 [2021-07-09 17:26:10,288 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:10,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:10,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1323309285, now seen corresponding path program 318 times [2021-07-09 17:26:10,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:10,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619434094] [2021-07-09 17:26:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:10,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619434094] [2021-07-09 17:26:10,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619434094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594214165] [2021-07-09 17:26:10,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:10,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:10,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594214165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:10,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:10,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439700112] [2021-07-09 17:26:10,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:10,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:10,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:10,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:10,419 INFO L87 Difference]: Start difference. First operand 5559 states and 16616 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:10,581 INFO L93 Difference]: Finished difference Result 7043 states and 20681 transitions. [2021-07-09 17:26:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:10,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:10,591 INFO L225 Difference]: With dead ends: 7043 [2021-07-09 17:26:10,591 INFO L226 Difference]: Without dead ends: 7043 [2021-07-09 17:26:10,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7043 states. [2021-07-09 17:26:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7043 to 3914. [2021-07-09 17:26:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 2.9608995655507284) internal successors, (11586), 3913 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 11586 transitions. [2021-07-09 17:26:10,662 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 11586 transitions. Word has length 21 [2021-07-09 17:26:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:10,662 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 11586 transitions. [2021-07-09 17:26:10,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 11586 transitions. [2021-07-09 17:26:10,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:10,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:10,666 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15493,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:10,881 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1151738888, now seen corresponding path program 319 times [2021-07-09 17:26:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876098576] [2021-07-09 17:26:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:10,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:10,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876098576] [2021-07-09 17:26:10,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876098576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975625033] [2021-07-09 17:26:10,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975625033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:10,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:10,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:10,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331114315] [2021-07-09 17:26:10,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:10,975 INFO L87 Difference]: Start difference. First operand 3914 states and 11586 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,041 INFO L93 Difference]: Finished difference Result 4174 states and 12068 transitions. [2021-07-09 17:26:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,047 INFO L225 Difference]: With dead ends: 4174 [2021-07-09 17:26:11,047 INFO L226 Difference]: Without dead ends: 4172 [2021-07-09 17:26:11,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-07-09 17:26:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3916. [2021-07-09 17:26:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 2.9591315453384417) internal successors, (11585), 3915 states have internal predecessors, (11585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 11585 transitions. [2021-07-09 17:26:11,103 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 11585 transitions. Word has length 21 [2021-07-09 17:26:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,104 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 11585 transitions. [2021-07-09 17:26:11,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 11585 transitions. [2021-07-09 17:26:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:11,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,108 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:11,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15494 [2021-07-09 17:26:11,324 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:11,324 INFO L82 PathProgramCache]: Analyzing trace with hash 374589289, now seen corresponding path program 320 times [2021-07-09 17:26:11,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:11,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891193877] [2021-07-09 17:26:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:11,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891193877] [2021-07-09 17:26:11,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891193877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791375694] [2021-07-09 17:26:11,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:11,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791375694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:11,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:11,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781414684] [2021-07-09 17:26:11,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:11,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:11,431 INFO L87 Difference]: Start difference. First operand 3916 states and 11585 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:11,554 INFO L93 Difference]: Finished difference Result 4111 states and 11901 transitions. [2021-07-09 17:26:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:11,561 INFO L225 Difference]: With dead ends: 4111 [2021-07-09 17:26:11,561 INFO L226 Difference]: Without dead ends: 4107 [2021-07-09 17:26:11,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-07-09 17:26:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3926. [2021-07-09 17:26:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 2.959235668789809) internal successors, (11615), 3925 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 11615 transitions. [2021-07-09 17:26:11,626 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 11615 transitions. Word has length 21 [2021-07-09 17:26:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:11,626 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 11615 transitions. [2021-07-09 17:26:11,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 11615 transitions. [2021-07-09 17:26:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:11,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:11,630 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:11,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15495,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,848 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:11,848 INFO L82 PathProgramCache]: Analyzing trace with hash 915664426, now seen corresponding path program 321 times [2021-07-09 17:26:11,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:11,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572670557] [2021-07-09 17:26:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572670557] [2021-07-09 17:26:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572670557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867529427] [2021-07-09 17:26:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:11,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:26:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:11,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:11,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867529427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:11,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:11,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:11,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493784365] [2021-07-09 17:26:11,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:11,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:11,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:11,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:11,954 INFO L87 Difference]: Start difference. First operand 3926 states and 11615 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:12,095 INFO L93 Difference]: Finished difference Result 4151 states and 11987 transitions. [2021-07-09 17:26:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:12,100 INFO L225 Difference]: With dead ends: 4151 [2021-07-09 17:26:12,100 INFO L226 Difference]: Without dead ends: 4139 [2021-07-09 17:26:12,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-07-09 17:26:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3894. [2021-07-09 17:26:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3894 states, 3893 states have (on average 2.959671204726432) internal successors, (11522), 3893 states have internal predecessors, (11522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3894 states to 3894 states and 11522 transitions. [2021-07-09 17:26:12,149 INFO L78 Accepts]: Start accepts. Automaton has 3894 states and 11522 transitions. Word has length 21 [2021-07-09 17:26:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:12,150 INFO L482 AbstractCegarLoop]: Abstraction has 3894 states and 11522 transitions. [2021-07-09 17:26:12,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3894 states and 11522 transitions. [2021-07-09 17:26:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:12,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:12,153 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:12,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15496 [2021-07-09 17:26:12,368 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 24342795, now seen corresponding path program 322 times [2021-07-09 17:26:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:12,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414469201] [2021-07-09 17:26:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:12,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414469201] [2021-07-09 17:26:12,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414469201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931201939] [2021-07-09 17:26:12,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:12,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:12,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:12,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931201939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:12,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503931483] [2021-07-09 17:26:12,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:12,475 INFO L87 Difference]: Start difference. First operand 3894 states and 11522 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:12,553 INFO L93 Difference]: Finished difference Result 4318 states and 12449 transitions. [2021-07-09 17:26:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:12,559 INFO L225 Difference]: With dead ends: 4318 [2021-07-09 17:26:12,559 INFO L226 Difference]: Without dead ends: 4318 [2021-07-09 17:26:12,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-07-09 17:26:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3872. [2021-07-09 17:26:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.9571170240247997) internal successors, (11447), 3871 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 11447 transitions. [2021-07-09 17:26:12,609 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 11447 transitions. Word has length 21 [2021-07-09 17:26:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:12,609 INFO L482 AbstractCegarLoop]: Abstraction has 3872 states and 11447 transitions. [2021-07-09 17:26:12,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 11447 transitions. [2021-07-09 17:26:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:12,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:12,613 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:12,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15497,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:12,830 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash 936670634, now seen corresponding path program 323 times [2021-07-09 17:26:12,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:12,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616676707] [2021-07-09 17:26:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:12,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616676707] [2021-07-09 17:26:12,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616676707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871174939] [2021-07-09 17:26:12,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:12,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:12,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871174939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:12,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:12,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:12,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148909756] [2021-07-09 17:26:12,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:12,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:12,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:12,946 INFO L87 Difference]: Start difference. First operand 3872 states and 11447 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:13,097 INFO L93 Difference]: Finished difference Result 4056 states and 11770 transitions. [2021-07-09 17:26:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:13,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:13,102 INFO L225 Difference]: With dead ends: 4056 [2021-07-09 17:26:13,102 INFO L226 Difference]: Without dead ends: 4048 [2021-07-09 17:26:13,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-07-09 17:26:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3878. [2021-07-09 17:26:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.9551199380964666) internal successors, (11457), 3877 states have internal predecessors, (11457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 11457 transitions. [2021-07-09 17:26:13,152 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 11457 transitions. Word has length 21 [2021-07-09 17:26:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:13,152 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 11457 transitions. [2021-07-09 17:26:13,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 11457 transitions. [2021-07-09 17:26:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:13,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:13,156 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:13,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15498,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,369 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:13,370 INFO L82 PathProgramCache]: Analyzing trace with hash 55852107, now seen corresponding path program 324 times [2021-07-09 17:26:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:13,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018644036] [2021-07-09 17:26:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018644036] [2021-07-09 17:26:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018644036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795974400] [2021-07-09 17:26:13,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:13,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795974400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:13,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508304273] [2021-07-09 17:26:13,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:13,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:13,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:13,487 INFO L87 Difference]: Start difference. First operand 3878 states and 11457 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:13,603 INFO L93 Difference]: Finished difference Result 4744 states and 13653 transitions. [2021-07-09 17:26:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:13,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:13,608 INFO L225 Difference]: With dead ends: 4744 [2021-07-09 17:26:13,608 INFO L226 Difference]: Without dead ends: 4744 [2021-07-09 17:26:13,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-07-09 17:26:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2823. [2021-07-09 17:26:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 2.919206236711552) internal successors, (8238), 2822 states have internal predecessors, (8238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8238 transitions. [2021-07-09 17:26:13,652 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8238 transitions. Word has length 21 [2021-07-09 17:26:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:13,652 INFO L482 AbstractCegarLoop]: Abstraction has 2823 states and 8238 transitions. [2021-07-09 17:26:13,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8238 transitions. [2021-07-09 17:26:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:13,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:13,654 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:13,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15499,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,870 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 493771494, now seen corresponding path program 325 times [2021-07-09 17:26:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:13,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349573656] [2021-07-09 17:26:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:13,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349573656] [2021-07-09 17:26:13,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349573656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568904472] [2021-07-09 17:26:13,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568904472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:14,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:14,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460255877] [2021-07-09 17:26:14,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:14,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:14,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:14,012 INFO L87 Difference]: Start difference. First operand 2823 states and 8238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:14,141 INFO L93 Difference]: Finished difference Result 3224 states and 9127 transitions. [2021-07-09 17:26:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:26:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:14,145 INFO L225 Difference]: With dead ends: 3224 [2021-07-09 17:26:14,145 INFO L226 Difference]: Without dead ends: 3214 [2021-07-09 17:26:14,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-07-09 17:26:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2839. [2021-07-09 17:26:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.9147286821705425) internal successors, (8272), 2838 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8272 transitions. [2021-07-09 17:26:14,180 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8272 transitions. Word has length 21 [2021-07-09 17:26:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:14,180 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 8272 transitions. [2021-07-09 17:26:14,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8272 transitions. [2021-07-09 17:26:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:14,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:14,182 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:14,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15500 [2021-07-09 17:26:14,399 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:14,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1538987045, now seen corresponding path program 326 times [2021-07-09 17:26:14,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:14,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225531872] [2021-07-09 17:26:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:14,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225531872] [2021-07-09 17:26:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225531872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390341311] [2021-07-09 17:26:14,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:14,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:14,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390341311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:14,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:14,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:14,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154815079] [2021-07-09 17:26:14,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:14,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:14,513 INFO L87 Difference]: Start difference. First operand 2839 states and 8272 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:14,700 INFO L93 Difference]: Finished difference Result 5034 states and 14432 transitions. [2021-07-09 17:26:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:14,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:14,706 INFO L225 Difference]: With dead ends: 5034 [2021-07-09 17:26:14,706 INFO L226 Difference]: Without dead ends: 5034 [2021-07-09 17:26:14,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-07-09 17:26:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3008. [2021-07-09 17:26:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.9514466245427338) internal successors, (8875), 3007 states have internal predecessors, (8875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8875 transitions. [2021-07-09 17:26:14,750 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8875 transitions. Word has length 21 [2021-07-09 17:26:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:14,750 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8875 transitions. [2021-07-09 17:26:14,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8875 transitions. [2021-07-09 17:26:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:14,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:14,753 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:14,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15501 [2021-07-09 17:26:14,969 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273354, now seen corresponding path program 327 times [2021-07-09 17:26:14,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:14,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940138445] [2021-07-09 17:26:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:15,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940138445] [2021-07-09 17:26:15,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940138445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127500215] [2021-07-09 17:26:15,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:15,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:15,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127500215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:15,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:15,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53961935] [2021-07-09 17:26:15,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:15,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:15,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:15,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:15,094 INFO L87 Difference]: Start difference. First operand 3008 states and 8875 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:15,223 INFO L93 Difference]: Finished difference Result 3214 states and 9274 transitions. [2021-07-09 17:26:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:26:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:15,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:15,227 INFO L225 Difference]: With dead ends: 3214 [2021-07-09 17:26:15,228 INFO L226 Difference]: Without dead ends: 3204 [2021-07-09 17:26:15,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-07-09 17:26:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3008. [2021-07-09 17:26:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.950116395078151) internal successors, (8871), 3007 states have internal predecessors, (8871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8871 transitions. [2021-07-09 17:26:15,262 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8871 transitions. Word has length 21 [2021-07-09 17:26:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:15,262 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8871 transitions. [2021-07-09 17:26:15,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8871 transitions. [2021-07-09 17:26:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:15,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:15,265 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:15,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15502 [2021-07-09 17:26:15,481 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -745057803, now seen corresponding path program 328 times [2021-07-09 17:26:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534005472] [2021-07-09 17:26:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:15,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534005472] [2021-07-09 17:26:15,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534005472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298588907] [2021-07-09 17:26:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:15,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:15,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:15,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:15,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:15,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298588907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:15,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:15,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:15,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005797353] [2021-07-09 17:26:15,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:15,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:15,590 INFO L87 Difference]: Start difference. First operand 3008 states and 8871 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:15,751 INFO L93 Difference]: Finished difference Result 3988 states and 11457 transitions. [2021-07-09 17:26:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:15,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:15,756 INFO L225 Difference]: With dead ends: 3988 [2021-07-09 17:26:15,756 INFO L226 Difference]: Without dead ends: 3986 [2021-07-09 17:26:15,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-07-09 17:26:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 1933. [2021-07-09 17:26:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9073498964803313) internal successors, (5617), 1932 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) [2021-07-09 17:26:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5617 transitions. [2021-07-09 17:26:15,790 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5617 transitions. Word has length 21 [2021-07-09 17:26:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:15,790 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 5617 transitions. [2021-07-09 17:26:15,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5617 transitions. [2021-07-09 17:26:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:15,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:15,792 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:16,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15503 [2021-07-09 17:26:16,005 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1768772814, now seen corresponding path program 329 times [2021-07-09 17:26:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:16,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039920686] [2021-07-09 17:26:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:16,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:16,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039920686] [2021-07-09 17:26:16,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039920686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615720723] [2021-07-09 17:26:16,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615720723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:16,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:16,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201028428] [2021-07-09 17:26:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:16,100 INFO L87 Difference]: Start difference. First operand 1933 states and 5617 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:16,150 INFO L93 Difference]: Finished difference Result 2184 states and 6076 transitions. [2021-07-09 17:26:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:16,152 INFO L225 Difference]: With dead ends: 2184 [2021-07-09 17:26:16,153 INFO L226 Difference]: Without dead ends: 2182 [2021-07-09 17:26:16,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-07-09 17:26:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1921. [2021-07-09 17:26:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 2.9036458333333335) internal successors, (5575), 1920 states have internal predecessors, (5575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 5575 transitions. [2021-07-09 17:26:16,174 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 5575 transitions. Word has length 21 [2021-07-09 17:26:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:16,174 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 5575 transitions. [2021-07-09 17:26:16,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 5575 transitions. [2021-07-09 17:26:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:16,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:16,176 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:16,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15504,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,393 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1749044883, now seen corresponding path program 330 times [2021-07-09 17:26:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622239426] [2021-07-09 17:26:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:16,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:16,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622239426] [2021-07-09 17:26:16,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622239426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281466279] [2021-07-09 17:26:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:26:16,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281466279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:16,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:16,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005738773] [2021-07-09 17:26:16,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:16,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:16,490 INFO L87 Difference]: Start difference. First operand 1921 states and 5575 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:16,584 INFO L93 Difference]: Finished difference Result 2090 states and 5850 transitions. [2021-07-09 17:26:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:16,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:16,588 INFO L225 Difference]: With dead ends: 2090 [2021-07-09 17:26:16,588 INFO L226 Difference]: Without dead ends: 2086 [2021-07-09 17:26:16,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-09 17:26:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1932. [2021-07-09 17:26:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9047125841532884) internal successors, (5609), 1931 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5609 transitions. [2021-07-09 17:26:16,615 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5609 transitions. Word has length 21 [2021-07-09 17:26:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:16,615 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 5609 transitions. [2021-07-09 17:26:16,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5609 transitions. [2021-07-09 17:26:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:16,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:16,617 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:16,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15505 [2021-07-09 17:26:16,834 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:16,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1217034640, now seen corresponding path program 331 times [2021-07-09 17:26:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:16,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125980472] [2021-07-09 17:26:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:16,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125980472] [2021-07-09 17:26:16,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125980472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566531245] [2021-07-09 17:26:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:16,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:16,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566531245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:16,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:16,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582671976] [2021-07-09 17:26:16,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:16,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:16,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:16,973 INFO L87 Difference]: Start difference. First operand 1932 states and 5609 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:17,102 INFO L93 Difference]: Finished difference Result 2179 states and 6040 transitions. [2021-07-09 17:26:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,105 INFO L225 Difference]: With dead ends: 2179 [2021-07-09 17:26:17,105 INFO L226 Difference]: Without dead ends: 2173 [2021-07-09 17:26:17,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-07-09 17:26:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1910. [2021-07-09 17:26:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.900995285489785) internal successors, (5538), 1909 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 5538 transitions. [2021-07-09 17:26:17,128 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 5538 transitions. Word has length 21 [2021-07-09 17:26:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:17,128 INFO L482 AbstractCegarLoop]: Abstraction has 1910 states and 5538 transitions. [2021-07-09 17:26:17,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 5538 transitions. [2021-07-09 17:26:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:17,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:17,130 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:17,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15506,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:17,345 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1936653967, now seen corresponding path program 332 times [2021-07-09 17:26:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:17,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541040314] [2021-07-09 17:26:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:17,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:17,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541040314] [2021-07-09 17:26:17,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541040314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126464116] [2021-07-09 17:26:17,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:17,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:17,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:17,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126464116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:17,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:17,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311970812] [2021-07-09 17:26:17,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:17,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:17,446 INFO L87 Difference]: Start difference. First operand 1910 states and 5538 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:17,534 INFO L93 Difference]: Finished difference Result 2223 states and 6180 transitions. [2021-07-09 17:26:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,537 INFO L225 Difference]: With dead ends: 2223 [2021-07-09 17:26:17,537 INFO L226 Difference]: Without dead ends: 2221 [2021-07-09 17:26:17,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-07-09 17:26:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1885. [2021-07-09 17:26:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 2.8959660297239913) internal successors, (5456), 1884 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 5456 transitions. [2021-07-09 17:26:17,559 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 5456 transitions. Word has length 21 [2021-07-09 17:26:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:17,559 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 5456 transitions. [2021-07-09 17:26:17,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 5456 transitions. [2021-07-09 17:26:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:17,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:17,561 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:17,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-07-09 17:26:17,776 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1430307701, now seen corresponding path program 333 times [2021-07-09 17:26:17,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:17,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530969058] [2021-07-09 17:26:17,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:17,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530969058] [2021-07-09 17:26:17,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530969058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639186597] [2021-07-09 17:26:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:17,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:17,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:17,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639186597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:17,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:17,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:17,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509221731] [2021-07-09 17:26:17,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:17,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:17,893 INFO L87 Difference]: Start difference. First operand 1885 states and 5456 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:17,963 INFO L93 Difference]: Finished difference Result 2639 states and 7430 transitions. [2021-07-09 17:26:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:26:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:17,979 INFO L225 Difference]: With dead ends: 2639 [2021-07-09 17:26:17,979 INFO L226 Difference]: Without dead ends: 2639 [2021-07-09 17:26:17,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2021-07-09 17:26:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2332. [2021-07-09 17:26:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 2.891033891033891) internal successors, (6739), 2331 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 6739 transitions. [2021-07-09 17:26:18,022 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 6739 transitions. Word has length 21 [2021-07-09 17:26:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:18,022 INFO L482 AbstractCegarLoop]: Abstraction has 2332 states and 6739 transitions. [2021-07-09 17:26:18,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 6739 transitions. [2021-07-09 17:26:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:18,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:18,024 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:18,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15508 [2021-07-09 17:26:18,241 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1868227088, now seen corresponding path program 334 times [2021-07-09 17:26:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:18,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394946344] [2021-07-09 17:26:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:18,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394946344] [2021-07-09 17:26:18,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394946344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880261669] [2021-07-09 17:26:18,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:18,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880261669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574899222] [2021-07-09 17:26:18,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:18,353 INFO L87 Difference]: Start difference. First operand 2332 states and 6739 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:18,502 INFO L93 Difference]: Finished difference Result 2899 states and 8005 transitions. [2021-07-09 17:26:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:18,506 INFO L225 Difference]: With dead ends: 2899 [2021-07-09 17:26:18,506 INFO L226 Difference]: Without dead ends: 2889 [2021-07-09 17:26:18,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-07-09 17:26:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2339. [2021-07-09 17:26:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.8896492728828056) internal successors, (6756), 2338 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6756 transitions. [2021-07-09 17:26:18,534 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6756 transitions. Word has length 21 [2021-07-09 17:26:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:18,534 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 6756 transitions. [2021-07-09 17:26:18,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6756 transitions. [2021-07-09 17:26:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:18,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:18,536 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:18,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15509,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,753 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1381524657, now seen corresponding path program 335 times [2021-07-09 17:26:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534768204] [2021-07-09 17:26:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:18,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534768204] [2021-07-09 17:26:18,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534768204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400063236] [2021-07-09 17:26:18,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:18,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:18,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:18,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:18,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:18,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400063236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:18,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:18,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:18,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317965332] [2021-07-09 17:26:18,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:18,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:18,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:18,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:18,871 INFO L87 Difference]: Start difference. First operand 2339 states and 6756 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:18,996 INFO L93 Difference]: Finished difference Result 2784 states and 7761 transitions. [2021-07-09 17:26:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:18,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:18,999 INFO L225 Difference]: With dead ends: 2784 [2021-07-09 17:26:18,999 INFO L226 Difference]: Without dead ends: 2784 [2021-07-09 17:26:19,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-07-09 17:26:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2068. [2021-07-09 17:26:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864537977745525) internal successors, (5921), 2067 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5921 transitions. [2021-07-09 17:26:19,026 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5921 transitions. Word has length 21 [2021-07-09 17:26:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:19,026 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5921 transitions. [2021-07-09 17:26:19,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5921 transitions. [2021-07-09 17:26:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:19,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:19,028 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:19,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15510,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:19,244 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1023255636, now seen corresponding path program 336 times [2021-07-09 17:26:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:19,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032023134] [2021-07-09 17:26:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:19,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:19,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032023134] [2021-07-09 17:26:19,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032023134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765571090] [2021-07-09 17:26:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:19,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:19,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:19,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:19,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765571090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:19,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:19,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308439310] [2021-07-09 17:26:19,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:19,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:19,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:19,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:19,370 INFO L87 Difference]: Start difference. First operand 2068 states and 5921 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:19,473 INFO L93 Difference]: Finished difference Result 2495 states and 6829 transitions. [2021-07-09 17:26:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:19,477 INFO L225 Difference]: With dead ends: 2495 [2021-07-09 17:26:19,477 INFO L226 Difference]: Without dead ends: 2483 [2021-07-09 17:26:19,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-07-09 17:26:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2068. [2021-07-09 17:26:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.864054184808902) internal successors, (5920), 2067 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5920 transitions. [2021-07-09 17:26:19,501 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5920 transitions. Word has length 21 [2021-07-09 17:26:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:19,501 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5920 transitions. [2021-07-09 17:26:19,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5920 transitions. [2021-07-09 17:26:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:19,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:19,504 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:19,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15511 [2021-07-09 17:26:19,721 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:19,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1645985461, now seen corresponding path program 337 times [2021-07-09 17:26:19,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:19,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369679418] [2021-07-09 17:26:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:19,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:19,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369679418] [2021-07-09 17:26:19,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369679418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619589775] [2021-07-09 17:26:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:19,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:19,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619589775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:19,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:19,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373180733] [2021-07-09 17:26:19,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:19,870 INFO L87 Difference]: Start difference. First operand 2068 states and 5920 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:20,079 INFO L93 Difference]: Finished difference Result 3237 states and 8989 transitions. [2021-07-09 17:26:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:26:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:20,083 INFO L225 Difference]: With dead ends: 3237 [2021-07-09 17:26:20,083 INFO L226 Difference]: Without dead ends: 3237 [2021-07-09 17:26:20,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2021-07-09 17:26:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 2165. [2021-07-09 17:26:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 2.863678373382625) internal successors, (6197), 2164 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 6197 transitions. [2021-07-09 17:26:20,112 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 6197 transitions. Word has length 21 [2021-07-09 17:26:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:20,112 INFO L482 AbstractCegarLoop]: Abstraction has 2165 states and 6197 transitions. [2021-07-09 17:26:20,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 6197 transitions. [2021-07-09 17:26:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:20,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:20,115 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:20,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15512 [2021-07-09 17:26:20,331 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash 94608648, now seen corresponding path program 338 times [2021-07-09 17:26:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:20,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365638231] [2021-07-09 17:26:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:20,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365638231] [2021-07-09 17:26:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365638231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23942891] [2021-07-09 17:26:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:20,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:20,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:20,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:20,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:20,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23942891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:20,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:20,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279736436] [2021-07-09 17:26:20,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:20,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:20,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:20,448 INFO L87 Difference]: Start difference. First operand 2165 states and 6197 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:20,551 INFO L93 Difference]: Finished difference Result 2340 states and 6503 transitions. [2021-07-09 17:26:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:20,554 INFO L225 Difference]: With dead ends: 2340 [2021-07-09 17:26:20,554 INFO L226 Difference]: Without dead ends: 2336 [2021-07-09 17:26:20,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-07-09 17:26:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2135. [2021-07-09 17:26:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8533270852858483) internal successors, (6089), 2134 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6089 transitions. [2021-07-09 17:26:20,580 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6089 transitions. Word has length 21 [2021-07-09 17:26:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:20,580 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 6089 transitions. [2021-07-09 17:26:20,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6089 transitions. [2021-07-09 17:26:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:20,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:20,582 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:20,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15513 [2021-07-09 17:26:20,798 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 578153513, now seen corresponding path program 339 times [2021-07-09 17:26:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364191265] [2021-07-09 17:26:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:20,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:20,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364191265] [2021-07-09 17:26:20,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364191265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115037323] [2021-07-09 17:26:20,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:20,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:20,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:20,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115037323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:20,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:20,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:20,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799886539] [2021-07-09 17:26:20,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:20,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:20,904 INFO L87 Difference]: Start difference. First operand 2135 states and 6089 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,074 INFO L93 Difference]: Finished difference Result 2321 states and 6379 transitions. [2021-07-09 17:26:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:26:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,078 INFO L225 Difference]: With dead ends: 2321 [2021-07-09 17:26:21,079 INFO L226 Difference]: Without dead ends: 2315 [2021-07-09 17:26:21,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-07-09 17:26:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2135. [2021-07-09 17:26:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 2.8509840674789126) internal successors, (6084), 2134 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 6084 transitions. [2021-07-09 17:26:21,108 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 6084 transitions. Word has length 21 [2021-07-09 17:26:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:21,109 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 6084 transitions. [2021-07-09 17:26:21,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 6084 transitions. [2021-07-09 17:26:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:21,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:21,111 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15514,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,328 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1541604198, now seen corresponding path program 340 times [2021-07-09 17:26:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:21,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957853761] [2021-07-09 17:26:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:21,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957853761] [2021-07-09 17:26:21,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957853761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025015984] [2021-07-09 17:26:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:21,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:21,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025015984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:21,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:21,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738345132] [2021-07-09 17:26:21,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:21,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:21,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:21,444 INFO L87 Difference]: Start difference. First operand 2135 states and 6084 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:21,589 INFO L93 Difference]: Finished difference Result 2405 states and 6657 transitions. [2021-07-09 17:26:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:21,592 INFO L225 Difference]: With dead ends: 2405 [2021-07-09 17:26:21,592 INFO L226 Difference]: Without dead ends: 2395 [2021-07-09 17:26:21,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-07-09 17:26:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2157. [2021-07-09 17:26:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 2.8501855287569575) internal successors, (6145), 2156 states have internal predecessors, (6145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 6145 transitions. [2021-07-09 17:26:21,617 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 6145 transitions. Word has length 21 [2021-07-09 17:26:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:21,618 INFO L482 AbstractCegarLoop]: Abstraction has 2157 states and 6145 transitions. [2021-07-09 17:26:21,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:21,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 6145 transitions. [2021-07-09 17:26:21,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:21,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:21,620 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:21,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15515 [2021-07-09 17:26:21,836 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1708147547, now seen corresponding path program 341 times [2021-07-09 17:26:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:21,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908626899] [2021-07-09 17:26:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908626899] [2021-07-09 17:26:21,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908626899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237993991] [2021-07-09 17:26:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:21,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:21,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:21,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:21,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237993991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:21,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:21,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:21,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336317851] [2021-07-09 17:26:21,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:21,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:21,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:21,973 INFO L87 Difference]: Start difference. First operand 2157 states and 6145 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:22,116 INFO L93 Difference]: Finished difference Result 2688 states and 7467 transitions. [2021-07-09 17:26:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:22,120 INFO L225 Difference]: With dead ends: 2688 [2021-07-09 17:26:22,120 INFO L226 Difference]: Without dead ends: 2686 [2021-07-09 17:26:22,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-07-09 17:26:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1554. [2021-07-09 17:26:22,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8126207340631035) internal successors, (4368), 1553 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4368 transitions. [2021-07-09 17:26:22,149 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4368 transitions. Word has length 21 [2021-07-09 17:26:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:22,149 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 4368 transitions. [2021-07-09 17:26:22,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4368 transitions. [2021-07-09 17:26:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:22,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:22,151 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:22,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15516 [2021-07-09 17:26:22,369 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash 696632746, now seen corresponding path program 342 times [2021-07-09 17:26:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:22,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62133800] [2021-07-09 17:26:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:22,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:22,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62133800] [2021-07-09 17:26:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62133800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357210582] [2021-07-09 17:26:22,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:22,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357210582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:22,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:22,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829738939] [2021-07-09 17:26:22,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:22,484 INFO L87 Difference]: Start difference. First operand 1554 states and 4368 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:22,592 INFO L93 Difference]: Finished difference Result 1983 states and 5292 transitions. [2021-07-09 17:26:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:22,595 INFO L225 Difference]: With dead ends: 1983 [2021-07-09 17:26:22,595 INFO L226 Difference]: Without dead ends: 1971 [2021-07-09 17:26:22,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-07-09 17:26:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1554. [2021-07-09 17:26:22,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 2.8106889890534448) internal successors, (4365), 1553 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 4365 transitions. [2021-07-09 17:26:22,614 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 4365 transitions. Word has length 21 [2021-07-09 17:26:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:22,614 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 4365 transitions. [2021-07-09 17:26:22,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 4365 transitions. [2021-07-09 17:26:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:22,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:22,616 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:22,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15517 [2021-07-09 17:26:22,833 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:22,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1319362571, now seen corresponding path program 343 times [2021-07-09 17:26:22,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:22,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869170559] [2021-07-09 17:26:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:22,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:22,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869170559] [2021-07-09 17:26:22,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869170559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486005310] [2021-07-09 17:26:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:22,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486005310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:22,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:22,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786597567] [2021-07-09 17:26:22,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:22,951 INFO L87 Difference]: Start difference. First operand 1554 states and 4365 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:23,160 INFO L93 Difference]: Finished difference Result 2612 states and 7115 transitions. [2021-07-09 17:26:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:26:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:23,163 INFO L225 Difference]: With dead ends: 2612 [2021-07-09 17:26:23,163 INFO L226 Difference]: Without dead ends: 2612 [2021-07-09 17:26:23,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-07-09 17:26:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1490. [2021-07-09 17:26:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 2.8280725319006046) internal successors, (4211), 1489 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4211 transitions. [2021-07-09 17:26:23,197 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4211 transitions. Word has length 21 [2021-07-09 17:26:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:23,197 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 4211 transitions. [2021-07-09 17:26:23,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4211 transitions. [2021-07-09 17:26:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:23,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:23,198 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:23,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15518,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:23,415 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1179807206, now seen corresponding path program 344 times [2021-07-09 17:26:23,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:23,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116502433] [2021-07-09 17:26:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:23,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:23,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116502433] [2021-07-09 17:26:23,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116502433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:23,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748806458] [2021-07-09 17:26:23,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:23,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:23,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748806458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:23,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:23,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195816310] [2021-07-09 17:26:23,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:23,516 INFO L87 Difference]: Start difference. First operand 1490 states and 4211 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:23,591 INFO L93 Difference]: Finished difference Result 1712 states and 4615 transitions. [2021-07-09 17:26:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:23,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:23,593 INFO L225 Difference]: With dead ends: 1712 [2021-07-09 17:26:23,593 INFO L226 Difference]: Without dead ends: 1712 [2021-07-09 17:26:23,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-07-09 17:26:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1470. [2021-07-09 17:26:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.821647379169503) internal successors, (4145), 1469 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4145 transitions. [2021-07-09 17:26:23,609 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4145 transitions. Word has length 21 [2021-07-09 17:26:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:23,610 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4145 transitions. [2021-07-09 17:26:23,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4145 transitions. [2021-07-09 17:26:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:23,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:23,611 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:23,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15519,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:23,827 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1436993883, now seen corresponding path program 345 times [2021-07-09 17:26:23,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:23,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485390268] [2021-07-09 17:26:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:23,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485390268] [2021-07-09 17:26:23,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485390268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:23,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913220439] [2021-07-09 17:26:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:23,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:23,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:23,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913220439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:23,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:23,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544169037] [2021-07-09 17:26:23,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:23,922 INFO L87 Difference]: Start difference. First operand 1470 states and 4145 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:24,046 INFO L93 Difference]: Finished difference Result 1612 states and 4366 transitions. [2021-07-09 17:26:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:24,048 INFO L225 Difference]: With dead ends: 1612 [2021-07-09 17:26:24,048 INFO L226 Difference]: Without dead ends: 1608 [2021-07-09 17:26:24,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-07-09 17:26:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1454. [2021-07-09 17:26:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 2.8183069511355816) internal successors, (4095), 1453 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4095 transitions. [2021-07-09 17:26:24,065 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4095 transitions. Word has length 21 [2021-07-09 17:26:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:24,065 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4095 transitions. [2021-07-09 17:26:24,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4095 transitions. [2021-07-09 17:26:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:24,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:24,067 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:24,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15520,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,283 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1062657916, now seen corresponding path program 346 times [2021-07-09 17:26:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:24,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999095524] [2021-07-09 17:26:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:24,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999095524] [2021-07-09 17:26:24,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999095524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40168119] [2021-07-09 17:26:24,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40168119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:24,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:24,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366409994] [2021-07-09 17:26:24,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:24,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:24,401 INFO L87 Difference]: Start difference. First operand 1454 states and 4095 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:24,548 INFO L93 Difference]: Finished difference Result 1781 states and 4786 transitions. [2021-07-09 17:26:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:26:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:24,551 INFO L225 Difference]: With dead ends: 1781 [2021-07-09 17:26:24,551 INFO L226 Difference]: Without dead ends: 1769 [2021-07-09 17:26:24,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-07-09 17:26:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1460. [2021-07-09 17:26:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 2.8115147361206305) internal successors, (4102), 1459 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4102 transitions. [2021-07-09 17:26:24,571 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4102 transitions. Word has length 21 [2021-07-09 17:26:24,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:24,571 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 4102 transitions. [2021-07-09 17:26:24,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4102 transitions. [2021-07-09 17:26:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:24,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:24,572 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:24,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15521,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,789 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:24,790 INFO L82 PathProgramCache]: Analyzing trace with hash -439928091, now seen corresponding path program 347 times [2021-07-09 17:26:24,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:24,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207174263] [2021-07-09 17:26:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207174263] [2021-07-09 17:26:24,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207174263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923427423] [2021-07-09 17:26:24,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:24,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:24,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:24,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:24,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:24,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923427423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:24,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:24,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:24,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028278434] [2021-07-09 17:26:24,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:24,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:24,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:24,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:24,904 INFO L87 Difference]: Start difference. First operand 1460 states and 4102 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:25,085 INFO L93 Difference]: Finished difference Result 1843 states and 4934 transitions. [2021-07-09 17:26:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:25,088 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 17:26:25,088 INFO L226 Difference]: Without dead ends: 1839 [2021-07-09 17:26:25,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-07-09 17:26:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1157. [2021-07-09 17:26:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7889273356401385) internal successors, (3224), 1156 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3224 transitions. [2021-07-09 17:26:25,103 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3224 transitions. Word has length 21 [2021-07-09 17:26:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:25,103 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3224 transitions. [2021-07-09 17:26:25,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3224 transitions. [2021-07-09 17:26:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:25,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:25,105 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15522,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,321 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2110322360, now seen corresponding path program 348 times [2021-07-09 17:26:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633771471] [2021-07-09 17:26:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633771471] [2021-07-09 17:26:25,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633771471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451758678] [2021-07-09 17:26:25,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:25,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:25,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451758678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:25,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:25,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012678435] [2021-07-09 17:26:25,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:25,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:25,419 INFO L87 Difference]: Start difference. First operand 1157 states and 3224 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:25,472 INFO L93 Difference]: Finished difference Result 1482 states and 3827 transitions. [2021-07-09 17:26:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:25,474 INFO L225 Difference]: With dead ends: 1482 [2021-07-09 17:26:25,474 INFO L226 Difference]: Without dead ends: 1482 [2021-07-09 17:26:25,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-07-09 17:26:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1173. [2021-07-09 17:26:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.803754266211604) internal successors, (3286), 1172 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3286 transitions. [2021-07-09 17:26:25,487 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3286 transitions. Word has length 21 [2021-07-09 17:26:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:25,487 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3286 transitions. [2021-07-09 17:26:25,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3286 transitions. [2021-07-09 17:26:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:25,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:25,488 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:25,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15523 [2021-07-09 17:26:25,705 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1407495337, now seen corresponding path program 349 times [2021-07-09 17:26:25,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:25,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441786910] [2021-07-09 17:26:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:25,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:25,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441786910] [2021-07-09 17:26:25,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441786910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89450648] [2021-07-09 17:26:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:25,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:25,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89450648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:25,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:25,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:26:25,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186340407] [2021-07-09 17:26:25,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:26:25,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:26:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:26:25,795 INFO L87 Difference]: Start difference. First operand 1173 states and 3286 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:25,904 INFO L93 Difference]: Finished difference Result 1332 states and 3551 transitions. [2021-07-09 17:26:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:25,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:25,906 INFO L225 Difference]: With dead ends: 1332 [2021-07-09 17:26:25,907 INFO L226 Difference]: Without dead ends: 1330 [2021-07-09 17:26:25,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-07-09 17:26:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1184. [2021-07-09 17:26:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.808114961961116) internal successors, (3322), 1183 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3322 transitions. [2021-07-09 17:26:25,919 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3322 transitions. Word has length 21 [2021-07-09 17:26:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:25,919 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3322 transitions. [2021-07-09 17:26:25,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3322 transitions. [2021-07-09 17:26:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:25,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:25,920 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:26,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15524,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,136 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:26,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1948570474, now seen corresponding path program 350 times [2021-07-09 17:26:26,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:26,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094476567] [2021-07-09 17:26:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094476567] [2021-07-09 17:26:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094476567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293899983] [2021-07-09 17:26:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293899983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:26,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:26,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220646260] [2021-07-09 17:26:26,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:26,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:26,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:26,235 INFO L87 Difference]: Start difference. First operand 1184 states and 3322 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:26,352 INFO L93 Difference]: Finished difference Result 1469 states and 3818 transitions. [2021-07-09 17:26:26,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:26,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:26,354 INFO L225 Difference]: With dead ends: 1469 [2021-07-09 17:26:26,354 INFO L226 Difference]: Without dead ends: 1463 [2021-07-09 17:26:26,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-07-09 17:26:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1184. [2021-07-09 17:26:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.804733727810651) internal successors, (3318), 1183 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3318 transitions. [2021-07-09 17:26:26,368 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3318 transitions. Word has length 21 [2021-07-09 17:26:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:26,368 INFO L482 AbstractCegarLoop]: Abstraction has 1184 states and 3318 transitions. [2021-07-09 17:26:26,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3318 transitions. [2021-07-09 17:26:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:26,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:26,369 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:26,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15525 [2021-07-09 17:26:26,586 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1057248843, now seen corresponding path program 351 times [2021-07-09 17:26:26,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:26,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977641734] [2021-07-09 17:26:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977641734] [2021-07-09 17:26:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977641734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54641164] [2021-07-09 17:26:26,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:26,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:26,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:26,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:26,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54641164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:26,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:26,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:26,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262489864] [2021-07-09 17:26:26,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:26,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:26,696 INFO L87 Difference]: Start difference. First operand 1184 states and 3318 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:26,794 INFO L93 Difference]: Finished difference Result 1448 states and 3844 transitions. [2021-07-09 17:26:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:26,796 INFO L225 Difference]: With dead ends: 1448 [2021-07-09 17:26:26,796 INFO L226 Difference]: Without dead ends: 1448 [2021-07-09 17:26:26,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-07-09 17:26:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1157. [2021-07-09 17:26:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7949826989619377) internal successors, (3231), 1156 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3231 transitions. [2021-07-09 17:26:26,809 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3231 transitions. Word has length 21 [2021-07-09 17:26:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:26,809 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3231 transitions. [2021-07-09 17:26:26,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3231 transitions. [2021-07-09 17:26:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:26,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:26,810 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:27,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15526 [2021-07-09 17:26:27,027 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:27,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1969576682, now seen corresponding path program 352 times [2021-07-09 17:26:27,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:27,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462521146] [2021-07-09 17:26:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:27,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:27,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462521146] [2021-07-09 17:26:27,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462521146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:27,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648011549] [2021-07-09 17:26:27,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:27,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648011549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:27,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:27,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838432687] [2021-07-09 17:26:27,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:27,149 INFO L87 Difference]: Start difference. First operand 1157 states and 3231 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:27,300 INFO L93 Difference]: Finished difference Result 1462 states and 3767 transitions. [2021-07-09 17:26:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:27,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:27,302 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:26:27,302 INFO L226 Difference]: Without dead ends: 1454 [2021-07-09 17:26:27,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:27,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-07-09 17:26:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1157. [2021-07-09 17:26:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.7932525951557095) internal successors, (3229), 1156 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3229 transitions. [2021-07-09 17:26:27,316 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3229 transitions. Word has length 21 [2021-07-09 17:26:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:27,316 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3229 transitions. [2021-07-09 17:26:27,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3229 transitions. [2021-07-09 17:26:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:27,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:27,317 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:27,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15527 [2021-07-09 17:26:27,536 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:27,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1088758155, now seen corresponding path program 353 times [2021-07-09 17:26:27,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:27,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576553846] [2021-07-09 17:26:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:27,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:27,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576553846] [2021-07-09 17:26:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576553846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:27,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609790329] [2021-07-09 17:26:27,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:27,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:27,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609790329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:27,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:27,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:27,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127698132] [2021-07-09 17:26:27,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:27,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:27,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:27,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:27,650 INFO L87 Difference]: Start difference. First operand 1157 states and 3229 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:27,765 INFO L93 Difference]: Finished difference Result 1409 states and 3711 transitions. [2021-07-09 17:26:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:27,768 INFO L225 Difference]: With dead ends: 1409 [2021-07-09 17:26:27,768 INFO L226 Difference]: Without dead ends: 1405 [2021-07-09 17:26:27,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-07-09 17:26:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1044. [2021-07-09 17:26:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.771812080536913) internal successors, (2891), 1043 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2891 transitions. [2021-07-09 17:26:27,782 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2891 transitions. Word has length 21 [2021-07-09 17:26:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:27,782 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 2891 transitions. [2021-07-09 17:26:27,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2891 transitions. [2021-07-09 17:26:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:27,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:27,783 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:27,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15528 [2021-07-09 17:26:27,997 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1723074203, now seen corresponding path program 354 times [2021-07-09 17:26:27,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:27,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630388586] [2021-07-09 17:26:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:28,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:28,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630388586] [2021-07-09 17:26:28,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630388586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:28,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67635144] [2021-07-09 17:26:28,049 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:28,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:26:28,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:28,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:28,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67635144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:28,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:28,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:28,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334721970] [2021-07-09 17:26:28,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:28,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:28,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:28,116 INFO L87 Difference]: Start difference. First operand 1044 states and 2891 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:28,212 INFO L93 Difference]: Finished difference Result 1522 states and 3994 transitions. [2021-07-09 17:26:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:28,215 INFO L225 Difference]: With dead ends: 1522 [2021-07-09 17:26:28,215 INFO L226 Difference]: Without dead ends: 1522 [2021-07-09 17:26:28,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-07-09 17:26:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1262. [2021-07-09 17:26:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7731958762886597) internal successors, (3497), 1261 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3497 transitions. [2021-07-09 17:26:28,230 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3497 transitions. Word has length 21 [2021-07-09 17:26:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:28,230 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 3497 transitions. [2021-07-09 17:26:28,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3497 transitions. [2021-07-09 17:26:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:28,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:28,232 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:28,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15529 [2021-07-09 17:26:28,449 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash 681706090, now seen corresponding path program 355 times [2021-07-09 17:26:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:28,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168820277] [2021-07-09 17:26:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:28,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:28,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168820277] [2021-07-09 17:26:28,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168820277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:28,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845007952] [2021-07-09 17:26:28,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:28,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:28,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845007952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:28,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:28,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:28,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589652224] [2021-07-09 17:26:28,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:28,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:28,574 INFO L87 Difference]: Start difference. First operand 1262 states and 3497 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:28,738 INFO L93 Difference]: Finished difference Result 2034 states and 5233 transitions. [2021-07-09 17:26:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:28,741 INFO L225 Difference]: With dead ends: 2034 [2021-07-09 17:26:28,741 INFO L226 Difference]: Without dead ends: 2022 [2021-07-09 17:26:28,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-09 17:26:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1292. [2021-07-09 17:26:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.7683965917893105) internal successors, (3574), 1291 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3574 transitions. [2021-07-09 17:26:28,758 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3574 transitions. Word has length 21 [2021-07-09 17:26:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:28,758 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 3574 transitions. [2021-07-09 17:26:28,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3574 transitions. [2021-07-09 17:26:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:28,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:28,760 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:28,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15530,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:28,977 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1304435915, now seen corresponding path program 356 times [2021-07-09 17:26:28,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:28,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962126532] [2021-07-09 17:26:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962126532] [2021-07-09 17:26:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962126532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837797122] [2021-07-09 17:26:29,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:29,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:29,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837797122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:29,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:29,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318036352] [2021-07-09 17:26:29,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:29,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:29,098 INFO L87 Difference]: Start difference. First operand 1292 states and 3574 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:29,257 INFO L93 Difference]: Finished difference Result 1611 states and 4182 transitions. [2021-07-09 17:26:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:29,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:29,260 INFO L225 Difference]: With dead ends: 1611 [2021-07-09 17:26:29,260 INFO L226 Difference]: Without dead ends: 1611 [2021-07-09 17:26:29,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-07-09 17:26:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1257. [2021-07-09 17:26:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.7619426751592355) internal successors, (3469), 1256 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3469 transitions. [2021-07-09 17:26:29,275 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3469 transitions. Word has length 21 [2021-07-09 17:26:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:29,275 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3469 transitions. [2021-07-09 17:26:29,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3469 transitions. [2021-07-09 17:26:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:29,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:29,277 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:29,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15531,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,493 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:29,494 INFO L82 PathProgramCache]: Analyzing trace with hash 257394854, now seen corresponding path program 357 times [2021-07-09 17:26:29,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:29,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148593548] [2021-07-09 17:26:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:29,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148593548] [2021-07-09 17:26:29,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148593548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105822023] [2021-07-09 17:26:29,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:29,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:29,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105822023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:29,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:29,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:29,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458771817] [2021-07-09 17:26:29,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:29,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:29,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:29,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:29,624 INFO L87 Difference]: Start difference. First operand 1257 states and 3469 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:29,737 INFO L93 Difference]: Finished difference Result 1884 states and 4813 transitions. [2021-07-09 17:26:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:29,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:29,740 INFO L225 Difference]: With dead ends: 1884 [2021-07-09 17:26:29,740 INFO L226 Difference]: Without dead ends: 1870 [2021-07-09 17:26:29,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-07-09 17:26:29,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1262. [2021-07-09 17:26:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.7573354480570975) internal successors, (3477), 1261 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3477 transitions. [2021-07-09 17:26:29,757 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3477 transitions. Word has length 21 [2021-07-09 17:26:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:29,757 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 3477 transitions. [2021-07-09 17:26:29,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3477 transitions. [2021-07-09 17:26:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:29,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:29,759 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:29,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15532,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:29,976 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash 667969061, now seen corresponding path program 358 times [2021-07-09 17:26:29,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:29,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166416748] [2021-07-09 17:26:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166416748] [2021-07-09 17:26:30,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166416748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178223002] [2021-07-09 17:26:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:30,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:30,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178223002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:30,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:30,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297275884] [2021-07-09 17:26:30,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:30,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:30,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:30,102 INFO L87 Difference]: Start difference. First operand 1262 states and 3477 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:30,349 INFO L93 Difference]: Finished difference Result 1832 states and 4763 transitions. [2021-07-09 17:26:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:26:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:26:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:30,352 INFO L225 Difference]: With dead ends: 1832 [2021-07-09 17:26:30,352 INFO L226 Difference]: Without dead ends: 1832 [2021-07-09 17:26:30,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=376, Invalid=746, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:26:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-07-09 17:26:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1349. [2021-07-09 17:26:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.770771513353116) internal successors, (3735), 1348 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3735 transitions. [2021-07-09 17:26:30,369 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3735 transitions. Word has length 21 [2021-07-09 17:26:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:30,369 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3735 transitions. [2021-07-09 17:26:30,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3735 transitions. [2021-07-09 17:26:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:30,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:30,370 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:30,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15533 [2021-07-09 17:26:30,587 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1440766350, now seen corresponding path program 359 times [2021-07-09 17:26:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:30,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067527216] [2021-07-09 17:26:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:30,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067527216] [2021-07-09 17:26:30,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067527216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647254607] [2021-07-09 17:26:30,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:30,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:26:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:30,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647254607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:30,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:30,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:30,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707678647] [2021-07-09 17:26:30,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:30,706 INFO L87 Difference]: Start difference. First operand 1349 states and 3735 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:30,811 INFO L93 Difference]: Finished difference Result 1621 states and 4225 transitions. [2021-07-09 17:26:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:30,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-07-09 17:26:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:30,813 INFO L225 Difference]: With dead ends: 1621 [2021-07-09 17:26:30,813 INFO L226 Difference]: Without dead ends: 1617 [2021-07-09 17:26:30,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-07-09 17:26:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1383. [2021-07-09 17:26:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.7836468885672936) internal successors, (3847), 1382 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3847 transitions. [2021-07-09 17:26:30,831 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3847 transitions. Word has length 21 [2021-07-09 17:26:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:30,831 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3847 transitions. [2021-07-09 17:26:30,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3847 transitions. [2021-07-09 17:26:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:30,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:30,832 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:31,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15534 [2021-07-09 17:26:31,046 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:31,047 INFO L82 PathProgramCache]: Analyzing trace with hash -957221485, now seen corresponding path program 360 times [2021-07-09 17:26:31,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:31,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182195300] [2021-07-09 17:26:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:31,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:31,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182195300] [2021-07-09 17:26:31,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182195300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47745535] [2021-07-09 17:26:31,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:31,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:31,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47745535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:31,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:26:31,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066390397] [2021-07-09 17:26:31,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:31,167 INFO L87 Difference]: Start difference. First operand 1383 states and 3847 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:31,360 INFO L93 Difference]: Finished difference Result 1662 states and 4335 transitions. [2021-07-09 17:26:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:26:31,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-07-09 17:26:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:31,363 INFO L225 Difference]: With dead ends: 1662 [2021-07-09 17:26:31,363 INFO L226 Difference]: Without dead ends: 1656 [2021-07-09 17:26:31,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-07-09 17:26:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1398. [2021-07-09 17:26:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7931281317108088) internal successors, (3902), 1397 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3902 transitions. [2021-07-09 17:26:31,381 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3902 transitions. Word has length 21 [2021-07-09 17:26:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:31,381 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 3902 transitions. [2021-07-09 17:26:31,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3902 transitions. [2021-07-09 17:26:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:31,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:31,382 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:31,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15535 [2021-07-09 17:26:31,583 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1489231728, now seen corresponding path program 361 times [2021-07-09 17:26:31,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:31,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794531504] [2021-07-09 17:26:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:31,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794531504] [2021-07-09 17:26:31,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794531504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310913784] [2021-07-09 17:26:31,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:31,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:31,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310913784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:31,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:31,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:31,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666626322] [2021-07-09 17:26:31,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:31,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:31,688 INFO L87 Difference]: Start difference. First operand 1398 states and 3902 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:31,793 INFO L93 Difference]: Finished difference Result 1568 states and 4165 transitions. [2021-07-09 17:26:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:31,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:31,795 INFO L225 Difference]: With dead ends: 1568 [2021-07-09 17:26:31,795 INFO L226 Difference]: Without dead ends: 1566 [2021-07-09 17:26:31,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-07-09 17:26:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-07-09 17:26:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.7924123120973516) internal successors, (3901), 1397 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 3901 transitions. [2021-07-09 17:26:31,811 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 3901 transitions. Word has length 21 [2021-07-09 17:26:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:31,811 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 3901 transitions. [2021-07-09 17:26:31,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 3901 transitions. [2021-07-09 17:26:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:31,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:31,812 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:32,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15536 [2021-07-09 17:26:32,029 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:32,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1169711439, now seen corresponding path program 362 times [2021-07-09 17:26:32,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:32,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161618246] [2021-07-09 17:26:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:32,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161618246] [2021-07-09 17:26:32,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161618246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955823906] [2021-07-09 17:26:32,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:32,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:32,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955823906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:32,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:32,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740813047] [2021-07-09 17:26:32,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:32,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:32,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:32,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:32,132 INFO L87 Difference]: Start difference. First operand 1398 states and 3901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:32,191 INFO L93 Difference]: Finished difference Result 1703 states and 4442 transitions. [2021-07-09 17:26:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:32,193 INFO L225 Difference]: With dead ends: 1703 [2021-07-09 17:26:32,193 INFO L226 Difference]: Without dead ends: 1703 [2021-07-09 17:26:32,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-07-09 17:26:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1399. [2021-07-09 17:26:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.78826895565093) internal successors, (3898), 1398 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 3898 transitions. [2021-07-09 17:26:32,209 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 3898 transitions. Word has length 21 [2021-07-09 17:26:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:32,209 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 3898 transitions. [2021-07-09 17:26:32,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 3898 transitions. [2021-07-09 17:26:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:32,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:32,210 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:32,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15537,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,427 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash -853668908, now seen corresponding path program 363 times [2021-07-09 17:26:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:32,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759667202] [2021-07-09 17:26:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:32,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:32,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759667202] [2021-07-09 17:26:32,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759667202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825886709] [2021-07-09 17:26:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:32,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:26:32,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:32,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825886709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:32,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:32,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:32,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533339778] [2021-07-09 17:26:32,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:32,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:32,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:32,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:32,558 INFO L87 Difference]: Start difference. First operand 1399 states and 3898 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:32,707 INFO L93 Difference]: Finished difference Result 1746 states and 4637 transitions. [2021-07-09 17:26:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:26:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:32,709 INFO L225 Difference]: With dead ends: 1746 [2021-07-09 17:26:32,709 INFO L226 Difference]: Without dead ends: 1734 [2021-07-09 17:26:32,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-07-09 17:26:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1419. [2021-07-09 17:26:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.796191819464034) internal successors, (3965), 1418 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 3965 transitions. [2021-07-09 17:26:32,728 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 3965 transitions. Word has length 21 [2021-07-09 17:26:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 3965 transitions. [2021-07-09 17:26:32,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 3965 transitions. [2021-07-09 17:26:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:32,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:32,730 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:32,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15538 [2021-07-09 17:26:32,947 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:32,947 INFO L82 PathProgramCache]: Analyzing trace with hash -230939083, now seen corresponding path program 364 times [2021-07-09 17:26:32,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:32,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015374270] [2021-07-09 17:26:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:33,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:33,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015374270] [2021-07-09 17:26:33,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015374270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131916112] [2021-07-09 17:26:33,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:33,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131916112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:33,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:33,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179805503] [2021-07-09 17:26:33,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:33,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:33,071 INFO L87 Difference]: Start difference. First operand 1419 states and 3965 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:33,217 INFO L93 Difference]: Finished difference Result 1714 states and 4627 transitions. [2021-07-09 17:26:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:26:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:33,220 INFO L225 Difference]: With dead ends: 1714 [2021-07-09 17:26:33,220 INFO L226 Difference]: Without dead ends: 1710 [2021-07-09 17:26:33,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-07-09 17:26:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1352. [2021-07-09 17:26:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.7860843819393044) internal successors, (3764), 1351 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3764 transitions. [2021-07-09 17:26:33,236 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3764 transitions. Word has length 21 [2021-07-09 17:26:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:33,236 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 3764 transitions. [2021-07-09 17:26:33,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3764 transitions. [2021-07-09 17:26:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:33,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:33,237 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:33,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15539,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:33,454 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:33,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1277980144, now seen corresponding path program 365 times [2021-07-09 17:26:33,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:33,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462363834] [2021-07-09 17:26:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462363834] [2021-07-09 17:26:33,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462363834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90355713] [2021-07-09 17:26:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:33,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:33,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:33,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90355713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:33,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:33,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:33,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774273040] [2021-07-09 17:26:33,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:33,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:33,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:33,574 INFO L87 Difference]: Start difference. First operand 1352 states and 3764 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:33,693 INFO L93 Difference]: Finished difference Result 1892 states and 4939 transitions. [2021-07-09 17:26:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:26:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:33,696 INFO L225 Difference]: With dead ends: 1892 [2021-07-09 17:26:33,696 INFO L226 Difference]: Without dead ends: 1878 [2021-07-09 17:26:33,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-07-09 17:26:33,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1354. [2021-07-09 17:26:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 2.785661492978566) internal successors, (3769), 1353 states have internal predecessors, (3769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 3769 transitions. [2021-07-09 17:26:33,713 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 3769 transitions. Word has length 21 [2021-07-09 17:26:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:33,713 INFO L482 AbstractCegarLoop]: Abstraction has 1354 states and 3769 transitions. [2021-07-09 17:26:33,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 3769 transitions. [2021-07-09 17:26:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:33,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:33,715 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:33,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15540,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:33,932 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -867405937, now seen corresponding path program 366 times [2021-07-09 17:26:33,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:33,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554844549] [2021-07-09 17:26:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554844549] [2021-07-09 17:26:34,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554844549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081667769] [2021-07-09 17:26:34,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:34,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:34,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:34,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081667769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:34,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:34,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840489753] [2021-07-09 17:26:34,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:34,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:34,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:34,083 INFO L87 Difference]: Start difference. First operand 1354 states and 3769 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:34,313 INFO L93 Difference]: Finished difference Result 1810 states and 4802 transitions. [2021-07-09 17:26:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:26:34,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:34,315 INFO L225 Difference]: With dead ends: 1810 [2021-07-09 17:26:34,315 INFO L226 Difference]: Without dead ends: 1810 [2021-07-09 17:26:34,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:26:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-07-09 17:26:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1323. [2021-07-09 17:26:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 2.793494704992436) internal successors, (3693), 1322 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3693 transitions. [2021-07-09 17:26:34,332 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3693 transitions. Word has length 21 [2021-07-09 17:26:34,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:34,332 INFO L482 AbstractCegarLoop]: Abstraction has 1323 states and 3693 transitions. [2021-07-09 17:26:34,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3693 transitions. [2021-07-09 17:26:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:34,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:34,334 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:34,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15541 [2021-07-09 17:26:34,551 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash 940996534, now seen corresponding path program 367 times [2021-07-09 17:26:34,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:34,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985834504] [2021-07-09 17:26:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:34,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985834504] [2021-07-09 17:26:34,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985834504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113443512] [2021-07-09 17:26:34,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:34,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113443512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:34,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:34,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:34,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118881453] [2021-07-09 17:26:34,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:34,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:34,660 INFO L87 Difference]: Start difference. First operand 1323 states and 3693 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:34,739 INFO L93 Difference]: Finished difference Result 1696 states and 4444 transitions. [2021-07-09 17:26:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:26:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-07-09 17:26:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:34,742 INFO L225 Difference]: With dead ends: 1696 [2021-07-09 17:26:34,742 INFO L226 Difference]: Without dead ends: 1696 [2021-07-09 17:26:34,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:26:34,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-07-09 17:26:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1401. [2021-07-09 17:26:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 2.8235714285714284) internal successors, (3953), 1400 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 3953 transitions. [2021-07-09 17:26:34,761 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 3953 transitions. Word has length 21 [2021-07-09 17:26:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:34,761 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 3953 transitions. [2021-07-09 17:26:34,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 3953 transitions. [2021-07-09 17:26:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:34,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:34,763 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:34,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15542,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:34,972 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1675804555, now seen corresponding path program 368 times [2021-07-09 17:26:34,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:34,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946250488] [2021-07-09 17:26:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:35,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946250488] [2021-07-09 17:26:35,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946250488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589475148] [2021-07-09 17:26:35,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:35,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589475148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:35,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:26:35,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985364144] [2021-07-09 17:26:35,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:35,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:35,071 INFO L87 Difference]: Start difference. First operand 1401 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:35,210 INFO L93 Difference]: Finished difference Result 1640 states and 4370 transitions. [2021-07-09 17:26:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:26:35,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-07-09 17:26:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:35,213 INFO L225 Difference]: With dead ends: 1640 [2021-07-09 17:26:35,213 INFO L226 Difference]: Without dead ends: 1636 [2021-07-09 17:26:35,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:26:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-07-09 17:26:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1419. [2021-07-09 17:26:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.8314527503526095) internal successors, (4015), 1418 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4015 transitions. [2021-07-09 17:26:35,229 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4015 transitions. Word has length 21 [2021-07-09 17:26:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:35,229 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4015 transitions. [2021-07-09 17:26:35,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4015 transitions. [2021-07-09 17:26:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:35,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:35,231 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:35,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15543,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:35,447 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:35,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1134729418, now seen corresponding path program 369 times [2021-07-09 17:26:35,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:35,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528081613] [2021-07-09 17:26:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528081613] [2021-07-09 17:26:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528081613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906222406] [2021-07-09 17:26:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:35,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:26:35,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:35,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:35,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906222406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:35,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980947371] [2021-07-09 17:26:35,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:35,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:35,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:35,556 INFO L87 Difference]: Start difference. First operand 1419 states and 4015 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:35,675 INFO L93 Difference]: Finished difference Result 1665 states and 4422 transitions. [2021-07-09 17:26:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:35,678 INFO L225 Difference]: With dead ends: 1665 [2021-07-09 17:26:35,678 INFO L226 Difference]: Without dead ends: 1663 [2021-07-09 17:26:35,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-07-09 17:26:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1419. [2021-07-09 17:26:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 2.830042313117066) internal successors, (4013), 1418 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4013 transitions. [2021-07-09 17:26:35,696 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4013 transitions. Word has length 21 [2021-07-09 17:26:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:35,696 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4013 transitions. [2021-07-09 17:26:35,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4013 transitions. [2021-07-09 17:26:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:35,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:35,697 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:35,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15544 [2021-07-09 17:26:35,914 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1524213749, now seen corresponding path program 370 times [2021-07-09 17:26:35,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:35,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833275133] [2021-07-09 17:26:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:35,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833275133] [2021-07-09 17:26:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833275133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175844796] [2021-07-09 17:26:35,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:35,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175844796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:36,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:36,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825891774] [2021-07-09 17:26:36,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:36,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:36,018 INFO L87 Difference]: Start difference. First operand 1419 states and 4013 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:36,097 INFO L93 Difference]: Finished difference Result 1795 states and 4748 transitions. [2021-07-09 17:26:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:36,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:36,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:36,100 INFO L225 Difference]: With dead ends: 1795 [2021-07-09 17:26:36,100 INFO L226 Difference]: Without dead ends: 1795 [2021-07-09 17:26:36,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:26:36,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-07-09 17:26:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1431. [2021-07-09 17:26:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827972027972028) internal successors, (4044), 1430 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4044 transitions. [2021-07-09 17:26:36,120 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4044 transitions. Word has length 21 [2021-07-09 17:26:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:36,120 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4044 transitions. [2021-07-09 17:26:36,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4044 transitions. [2021-07-09 17:26:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:36,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:36,122 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:36,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15545 [2021-07-09 17:26:36,323 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:36,324 INFO L82 PathProgramCache]: Analyzing trace with hash 18584182, now seen corresponding path program 371 times [2021-07-09 17:26:36,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:36,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494051377] [2021-07-09 17:26:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494051377] [2021-07-09 17:26:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494051377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364548732] [2021-07-09 17:26:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:36,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:36,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364548732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:36,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136265795] [2021-07-09 17:26:36,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:36,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:36,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:36,443 INFO L87 Difference]: Start difference. First operand 1431 states and 4044 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:36,582 INFO L93 Difference]: Finished difference Result 1934 states and 5102 transitions. [2021-07-09 17:26:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:26:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:36,586 INFO L225 Difference]: With dead ends: 1934 [2021-07-09 17:26:36,586 INFO L226 Difference]: Without dead ends: 1920 [2021-07-09 17:26:36,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-07-09 17:26:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1431. [2021-07-09 17:26:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.827272727272727) internal successors, (4043), 1430 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4043 transitions. [2021-07-09 17:26:36,605 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4043 transitions. Word has length 21 [2021-07-09 17:26:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:36,605 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4043 transitions. [2021-07-09 17:26:36,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4043 transitions. [2021-07-09 17:26:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:36,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:36,607 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:36,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15546 [2021-07-09 17:26:36,824 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash 429158389, now seen corresponding path program 372 times [2021-07-09 17:26:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:36,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114656026] [2021-07-09 17:26:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:36,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114656026] [2021-07-09 17:26:36,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114656026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988482773] [2021-07-09 17:26:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:36,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988482773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:36,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:36,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:36,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980075027] [2021-07-09 17:26:36,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:36,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:36,969 INFO L87 Difference]: Start difference. First operand 1431 states and 4043 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:37,173 INFO L93 Difference]: Finished difference Result 1818 states and 4976 transitions. [2021-07-09 17:26:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:37,175 INFO L225 Difference]: With dead ends: 1818 [2021-07-09 17:26:37,176 INFO L226 Difference]: Without dead ends: 1818 [2021-07-09 17:26:37,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:26:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-07-09 17:26:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1629. [2021-07-09 17:26:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.8316953316953315) internal successors, (4610), 1628 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 4610 transitions. [2021-07-09 17:26:37,195 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 4610 transitions. Word has length 21 [2021-07-09 17:26:37,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:37,195 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 4610 transitions. [2021-07-09 17:26:37,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 4610 transitions. [2021-07-09 17:26:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:37,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:37,197 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:37,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15547 [2021-07-09 17:26:37,413 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash 186543602, now seen corresponding path program 373 times [2021-07-09 17:26:37,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:37,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919903847] [2021-07-09 17:26:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:37,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919903847] [2021-07-09 17:26:37,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919903847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180798230] [2021-07-09 17:26:37,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:37,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180798230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:37,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:37,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787194901] [2021-07-09 17:26:37,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:37,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:37,509 INFO L87 Difference]: Start difference. First operand 1629 states and 4610 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:37,568 INFO L93 Difference]: Finished difference Result 2167 states and 5841 transitions. [2021-07-09 17:26:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:26:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:37,571 INFO L225 Difference]: With dead ends: 2167 [2021-07-09 17:26:37,571 INFO L226 Difference]: Without dead ends: 2167 [2021-07-09 17:26:37,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-07-09 17:26:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1854. [2021-07-09 17:26:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 2.870480302212628) internal successors, (5319), 1853 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 5319 transitions. [2021-07-09 17:26:37,596 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 5319 transitions. Word has length 21 [2021-07-09 17:26:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:37,596 INFO L482 AbstractCegarLoop]: Abstraction has 1854 states and 5319 transitions. [2021-07-09 17:26:37,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 5319 transitions. [2021-07-09 17:26:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:37,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:37,598 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:37,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15548 [2021-07-09 17:26:37,815 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash -590605997, now seen corresponding path program 374 times [2021-07-09 17:26:37,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:37,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986311066] [2021-07-09 17:26:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:37,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986311066] [2021-07-09 17:26:37,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986311066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011711818] [2021-07-09 17:26:37,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:37,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:37,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011711818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:37,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:37,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830773578] [2021-07-09 17:26:37,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:37,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:37,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:37,912 INFO L87 Difference]: Start difference. First operand 1854 states and 5319 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:38,052 INFO L93 Difference]: Finished difference Result 2069 states and 5690 transitions. [2021-07-09 17:26:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:38,055 INFO L225 Difference]: With dead ends: 2069 [2021-07-09 17:26:38,055 INFO L226 Difference]: Without dead ends: 2067 [2021-07-09 17:26:38,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-07-09 17:26:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1876. [2021-07-09 17:26:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8789333333333333) internal successors, (5398), 1875 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5398 transitions. [2021-07-09 17:26:38,080 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5398 transitions. Word has length 21 [2021-07-09 17:26:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:38,080 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5398 transitions. [2021-07-09 17:26:38,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5398 transitions. [2021-07-09 17:26:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:38,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:38,082 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:38,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15549,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,299 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1538935856, now seen corresponding path program 375 times [2021-07-09 17:26:38,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:38,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832009251] [2021-07-09 17:26:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:38,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832009251] [2021-07-09 17:26:38,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832009251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070448015] [2021-07-09 17:26:38,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:38,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:38,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070448015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:38,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:38,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918262975] [2021-07-09 17:26:38,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:38,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:38,401 INFO L87 Difference]: Start difference. First operand 1876 states and 5398 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:38,526 INFO L93 Difference]: Finished difference Result 2160 states and 5868 transitions. [2021-07-09 17:26:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:38,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:38,529 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 17:26:38,529 INFO L226 Difference]: Without dead ends: 2158 [2021-07-09 17:26:38,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-07-09 17:26:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1876. [2021-07-09 17:26:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.8784) internal successors, (5397), 1875 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5397 transitions. [2021-07-09 17:26:38,557 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5397 transitions. Word has length 21 [2021-07-09 17:26:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:38,558 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5397 transitions. [2021-07-09 17:26:38,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5397 transitions. [2021-07-09 17:26:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:38,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:38,560 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:38,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15550,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,777 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1120007311, now seen corresponding path program 376 times [2021-07-09 17:26:38,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:38,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46832079] [2021-07-09 17:26:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:38,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46832079] [2021-07-09 17:26:38,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46832079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615483153] [2021-07-09 17:26:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:38,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:38,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615483153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:38,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:38,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:38,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608019079] [2021-07-09 17:26:38,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:38,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:38,879 INFO L87 Difference]: Start difference. First operand 1876 states and 5397 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:38,970 INFO L93 Difference]: Finished difference Result 2164 states and 5944 transitions. [2021-07-09 17:26:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:26:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:38,973 INFO L225 Difference]: With dead ends: 2164 [2021-07-09 17:26:38,973 INFO L226 Difference]: Without dead ends: 2164 [2021-07-09 17:26:38,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:26:38,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-07-09 17:26:39,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 1880. [2021-07-09 17:26:39,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.8786588610963277) internal successors, (5409), 1879 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5409 transitions. [2021-07-09 17:26:39,018 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5409 transitions. Word has length 21 [2021-07-09 17:26:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:39,018 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 5409 transitions. [2021-07-09 17:26:39,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5409 transitions. [2021-07-09 17:26:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:39,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:39,021 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:39,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15551,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:39,234 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash -49530860, now seen corresponding path program 377 times [2021-07-09 17:26:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:39,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43961745] [2021-07-09 17:26:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:39,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:39,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43961745] [2021-07-09 17:26:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43961745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785986694] [2021-07-09 17:26:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:39,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:39,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:39,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785986694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:39,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827479543] [2021-07-09 17:26:39,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:39,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:39,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:39,328 INFO L87 Difference]: Start difference. First operand 1880 states and 5409 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:39,439 INFO L93 Difference]: Finished difference Result 2226 states and 6044 transitions. [2021-07-09 17:26:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:39,442 INFO L225 Difference]: With dead ends: 2226 [2021-07-09 17:26:39,442 INFO L226 Difference]: Without dead ends: 2222 [2021-07-09 17:26:39,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:26:39,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-07-09 17:26:39,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1880. [2021-07-09 17:26:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.87812666311868) internal successors, (5408), 1879 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 5408 transitions. [2021-07-09 17:26:39,468 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 5408 transitions. Word has length 21 [2021-07-09 17:26:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:39,468 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 5408 transitions. [2021-07-09 17:26:39,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 5408 transitions. [2021-07-09 17:26:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:39,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:39,471 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:39,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15552,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:39,688 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:39,688 INFO L82 PathProgramCache]: Analyzing trace with hash -940852491, now seen corresponding path program 378 times [2021-07-09 17:26:39,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:39,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614720052] [2021-07-09 17:26:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:39,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:39,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614720052] [2021-07-09 17:26:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614720052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052609263] [2021-07-09 17:26:39,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:39,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:26:39,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052609263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:39,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:39,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:26:39,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911837622] [2021-07-09 17:26:39,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:26:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:26:39,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:26:39,802 INFO L87 Difference]: Start difference. First operand 1880 states and 5408 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:39,915 INFO L93 Difference]: Finished difference Result 2131 states and 5923 transitions. [2021-07-09 17:26:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:26:39,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 21 [2021-07-09 17:26:39,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:39,917 INFO L225 Difference]: With dead ends: 2131 [2021-07-09 17:26:39,917 INFO L226 Difference]: Without dead ends: 2131 [2021-07-09 17:26:39,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-07-09 17:26:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1896. [2021-07-09 17:26:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 2.880738786279683) internal successors, (5459), 1895 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 5459 transitions. [2021-07-09 17:26:39,940 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 5459 transitions. Word has length 21 [2021-07-09 17:26:39,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:39,940 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 5459 transitions. [2021-07-09 17:26:39,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 5459 transitions. [2021-07-09 17:26:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:39,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:39,943 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:40,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15553,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,160 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1122616240, now seen corresponding path program 379 times [2021-07-09 17:26:40,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:40,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853303044] [2021-07-09 17:26:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:40,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853303044] [2021-07-09 17:26:40,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853303044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349828964] [2021-07-09 17:26:40,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:40,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349828964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:40,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:40,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017588551] [2021-07-09 17:26:40,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:40,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:40,264 INFO L87 Difference]: Start difference. First operand 1896 states and 5459 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:40,388 INFO L93 Difference]: Finished difference Result 2262 states and 6134 transitions. [2021-07-09 17:26:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-07-09 17:26:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:40,391 INFO L225 Difference]: With dead ends: 2262 [2021-07-09 17:26:40,391 INFO L226 Difference]: Without dead ends: 2256 [2021-07-09 17:26:40,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:26:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-07-09 17:26:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1915. [2021-07-09 17:26:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.8876698014629048) internal successors, (5527), 1914 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5527 transitions. [2021-07-09 17:26:40,416 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5527 transitions. Word has length 21 [2021-07-09 17:26:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:40,416 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5527 transitions. [2021-07-09 17:26:40,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5527 transitions. [2021-07-09 17:26:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:40,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:40,418 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:40,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15554,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,619 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash -402996913, now seen corresponding path program 380 times [2021-07-09 17:26:40,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:40,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26217333] [2021-07-09 17:26:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26217333] [2021-07-09 17:26:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26217333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932764817] [2021-07-09 17:26:40,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:40,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:40,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932764817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:40,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:40,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:40,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559471381] [2021-07-09 17:26:40,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:40,732 INFO L87 Difference]: Start difference. First operand 1915 states and 5527 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:40,882 INFO L93 Difference]: Finished difference Result 2204 states and 6118 transitions. [2021-07-09 17:26:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:40,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-07-09 17:26:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:40,886 INFO L225 Difference]: With dead ends: 2204 [2021-07-09 17:26:40,886 INFO L226 Difference]: Without dead ends: 2202 [2021-07-09 17:26:40,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-07-09 17:26:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1917. [2021-07-09 17:26:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.887787056367432) internal successors, (5533), 1916 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 5533 transitions. [2021-07-09 17:26:40,911 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 5533 transitions. Word has length 21 [2021-07-09 17:26:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:40,911 INFO L482 AbstractCegarLoop]: Abstraction has 1917 states and 5533 transitions. [2021-07-09 17:26:40,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 5533 transitions. [2021-07-09 17:26:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:40,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:40,914 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:41,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15555 [2021-07-09 17:26:41,130 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:41,130 INFO L82 PathProgramCache]: Analyzing trace with hash -909343179, now seen corresponding path program 381 times [2021-07-09 17:26:41,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:41,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079162163] [2021-07-09 17:26:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:41,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:41,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079162163] [2021-07-09 17:26:41,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079162163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999875837] [2021-07-09 17:26:41,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:41,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999875837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:41,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:26:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611053809] [2021-07-09 17:26:41,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:26:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:26:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:26:41,241 INFO L87 Difference]: Start difference. First operand 1917 states and 5533 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:41,391 INFO L93 Difference]: Finished difference Result 2248 states and 6327 transitions. [2021-07-09 17:26:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 21 [2021-07-09 17:26:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:41,396 INFO L225 Difference]: With dead ends: 2248 [2021-07-09 17:26:41,396 INFO L226 Difference]: Without dead ends: 2248 [2021-07-09 17:26:41,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:26:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-09 17:26:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2054. [2021-07-09 17:26:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.895762299074525) internal successors, (5945), 2053 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5945 transitions. [2021-07-09 17:26:41,433 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5945 transitions. Word has length 21 [2021-07-09 17:26:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:41,433 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 5945 transitions. [2021-07-09 17:26:41,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5945 transitions. [2021-07-09 17:26:41,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:41,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:41,435 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:41,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15556 [2021-07-09 17:26:41,654 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash -471423792, now seen corresponding path program 382 times [2021-07-09 17:26:41,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:41,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421713286] [2021-07-09 17:26:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:41,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421713286] [2021-07-09 17:26:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421713286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512466656] [2021-07-09 17:26:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:41,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:41,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:41,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512466656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:41,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:41,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:41,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384617645] [2021-07-09 17:26:41,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:41,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:41,762 INFO L87 Difference]: Start difference. First operand 2054 states and 5945 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:41,911 INFO L93 Difference]: Finished difference Result 2927 states and 7947 transitions. [2021-07-09 17:26:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-07-09 17:26:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:41,916 INFO L225 Difference]: With dead ends: 2927 [2021-07-09 17:26:41,916 INFO L226 Difference]: Without dead ends: 2917 [2021-07-09 17:26:41,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-07-09 17:26:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2066. [2021-07-09 17:26:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8949152542372882) internal successors, (5978), 2065 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5978 transitions. [2021-07-09 17:26:41,948 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5978 transitions. Word has length 21 [2021-07-09 17:26:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:41,948 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5978 transitions. [2021-07-09 17:26:41,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5978 transitions. [2021-07-09 17:26:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:41,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:41,951 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:42,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15557 [2021-07-09 17:26:42,151 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 573791759, now seen corresponding path program 383 times [2021-07-09 17:26:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:42,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952567095] [2021-07-09 17:26:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:42,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952567095] [2021-07-09 17:26:42,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952567095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483785910] [2021-07-09 17:26:42,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:42,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:26:42,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:42,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:42,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483785910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:42,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:42,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367597773] [2021-07-09 17:26:42,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:42,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:42,274 INFO L87 Difference]: Start difference. First operand 2066 states and 5978 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:42,403 INFO L93 Difference]: Finished difference Result 2220 states and 6263 transitions. [2021-07-09 17:26:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:26:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-07-09 17:26:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:42,406 INFO L225 Difference]: With dead ends: 2220 [2021-07-09 17:26:42,407 INFO L226 Difference]: Without dead ends: 2214 [2021-07-09 17:26:42,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:26:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-07-09 17:26:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2055. [2021-07-09 17:26:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8938656280428434) internal successors, (5944), 2054 states have internal predecessors, (5944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5944 transitions. [2021-07-09 17:26:42,430 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5944 transitions. Word has length 21 [2021-07-09 17:26:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:42,431 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5944 transitions. [2021-07-09 17:26:42,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5944 transitions. [2021-07-09 17:26:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:42,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:42,433 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:42,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15558 [2021-07-09 17:26:42,640 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -693665419, now seen corresponding path program 384 times [2021-07-09 17:26:42,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:42,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346182337] [2021-07-09 17:26:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:42,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:42,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346182337] [2021-07-09 17:26:42,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346182337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548358212] [2021-07-09 17:26:42,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:42,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:26:42,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548358212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:42,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:42,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-09 17:26:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575922974] [2021-07-09 17:26:42,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:26:42,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:26:42,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:26:42,769 INFO L87 Difference]: Start difference. First operand 2055 states and 5944 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:42,873 INFO L93 Difference]: Finished difference Result 2405 states and 6839 transitions. [2021-07-09 17:26:42,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:26:42,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-07-09 17:26:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:42,877 INFO L225 Difference]: With dead ends: 2405 [2021-07-09 17:26:42,877 INFO L226 Difference]: Without dead ends: 2405 [2021-07-09 17:26:42,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:26:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-09 17:26:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2231. [2021-07-09 17:26:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.8937219730941703) internal successors, (6453), 2230 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6453 transitions. [2021-07-09 17:26:42,908 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6453 transitions. Word has length 21 [2021-07-09 17:26:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:42,908 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6453 transitions. [2021-07-09 17:26:42,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6453 transitions. [2021-07-09 17:26:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:42,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:42,911 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:43,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15559 [2021-07-09 17:26:43,129 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1740706480, now seen corresponding path program 385 times [2021-07-09 17:26:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:43,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914143568] [2021-07-09 17:26:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:43,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914143568] [2021-07-09 17:26:43,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914143568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399380102] [2021-07-09 17:26:43,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399380102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:43,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191900354] [2021-07-09 17:26:43,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:43,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:43,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:43,250 INFO L87 Difference]: Start difference. First operand 2231 states and 6453 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:43,396 INFO L93 Difference]: Finished difference Result 3084 states and 8355 transitions. [2021-07-09 17:26:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:26:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:43,400 INFO L225 Difference]: With dead ends: 3084 [2021-07-09 17:26:43,400 INFO L226 Difference]: Without dead ends: 3070 [2021-07-09 17:26:43,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:26:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-07-09 17:26:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2241. [2021-07-09 17:26:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.8924107142857145) internal successors, (6479), 2240 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 6479 transitions. [2021-07-09 17:26:43,438 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 6479 transitions. Word has length 21 [2021-07-09 17:26:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:43,438 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 6479 transitions. [2021-07-09 17:26:43,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 6479 transitions. [2021-07-09 17:26:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:43,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:43,441 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:43,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15560 [2021-07-09 17:26:43,659 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:43,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:43,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1330132273, now seen corresponding path program 386 times [2021-07-09 17:26:43,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:43,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571706008] [2021-07-09 17:26:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:43,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571706008] [2021-07-09 17:26:43,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571706008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296840718] [2021-07-09 17:26:43,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:43,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:26:43,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:43,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:43,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:43,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296840718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:43,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:43,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:43,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161287590] [2021-07-09 17:26:43,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:43,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:43,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:43,784 INFO L87 Difference]: Start difference. First operand 2241 states and 6479 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:43,966 INFO L93 Difference]: Finished difference Result 2484 states and 7025 transitions. [2021-07-09 17:26:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:26:43,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:43,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:43,970 INFO L225 Difference]: With dead ends: 2484 [2021-07-09 17:26:43,970 INFO L226 Difference]: Without dead ends: 2484 [2021-07-09 17:26:43,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:26:43,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-07-09 17:26:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2245. [2021-07-09 17:26:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 2.892602495543672) internal successors, (6491), 2244 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 6491 transitions. [2021-07-09 17:26:43,998 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 6491 transitions. Word has length 21 [2021-07-09 17:26:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:43,998 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 6491 transitions. [2021-07-09 17:26:43,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 6491 transitions. [2021-07-09 17:26:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:44,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:44,000 INFO L508 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:44,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15561,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:44,217 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2009452908, now seen corresponding path program 387 times [2021-07-09 17:26:44,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:44,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313945703] [2021-07-09 17:26:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:44,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:44,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313945703] [2021-07-09 17:26:44,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313945703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834742475] [2021-07-09 17:26:44,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:44,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:26:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834742475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:44,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966743241] [2021-07-09 17:26:44,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:44,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:44,342 INFO L87 Difference]: Start difference. First operand 2245 states and 6491 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:44,421 INFO L93 Difference]: Finished difference Result 2777 states and 7639 transitions. [2021-07-09 17:26:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:26:44,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:44,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:44,425 INFO L225 Difference]: With dead ends: 2777 [2021-07-09 17:26:44,425 INFO L226 Difference]: Without dead ends: 2761 [2021-07-09 17:26:44,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:26:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-07-09 17:26:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2243. [2021-07-09 17:26:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 2.893398751115076) internal successors, (6487), 2242 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 6487 transitions. [2021-07-09 17:26:44,454 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 6487 transitions. Word has length 21 [2021-07-09 17:26:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:44,454 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 6487 transitions. [2021-07-09 17:26:44,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 6487 transitions. [2021-07-09 17:26:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:26:44,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:44,457 INFO L508 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:44,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15562,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:44,673 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 414231733, now seen corresponding path program 388 times [2021-07-09 17:26:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:44,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679750617] [2021-07-09 17:26:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:44,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679750617] [2021-07-09 17:26:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679750617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438646792] [2021-07-09 17:26:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:44,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:26:44,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:26:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:44,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438646792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:44,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:44,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-07-09 17:26:44,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030682092] [2021-07-09 17:26:44,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:26:44,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:44,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:26:44,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:26:44,821 INFO L87 Difference]: Start difference. First operand 2243 states and 6487 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:45,042 INFO L93 Difference]: Finished difference Result 2725 states and 7700 transitions. [2021-07-09 17:26:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:26:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-07-09 17:26:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:45,046 INFO L225 Difference]: With dead ends: 2725 [2021-07-09 17:26:45,046 INFO L226 Difference]: Without dead ends: 2725 [2021-07-09 17:26:45,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:26:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-07-09 17:26:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2301. [2021-07-09 17:26:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.893478260869565) internal successors, (6655), 2300 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6655 transitions. [2021-07-09 17:26:45,078 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6655 transitions. Word has length 21 [2021-07-09 17:26:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:45,079 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 6655 transitions. [2021-07-09 17:26:45,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6655 transitions. [2021-07-09 17:26:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:26:45,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:45,081 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:45,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15563,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:45,298 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1134083623, now seen corresponding path program 389 times [2021-07-09 17:26:45,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:45,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771665672] [2021-07-09 17:26:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:45,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771665672] [2021-07-09 17:26:45,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771665672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619685707] [2021-07-09 17:26:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:45,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:26:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:45,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:26:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:45,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:26:47,021 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 420 [2021-07-09 17:26:47,201 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 420 [2021-07-09 17:26:47,420 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 431 [2021-07-09 17:26:47,834 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 466 [2021-07-09 17:26:48,014 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 277 [2021-07-09 17:26:48,194 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 288 [2021-07-09 17:26:48,948 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 257 [2021-07-09 17:26:49,669 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 279 [2021-07-09 17:26:49,891 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 428 [2021-07-09 17:26:50,973 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 302 [2021-07-09 17:26:51,415 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 633 [2021-07-09 17:26:52,028 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 1269 DAG size of output: 805 [2021-07-09 17:26:52,593 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 1269 DAG size of output: 805 [2021-07-09 17:26:53,324 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 1274 DAG size of output: 810 [2021-07-09 17:26:53,882 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 898 [2021-07-09 17:26:54,563 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 286 [2021-07-09 17:26:54,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:54,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:54,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:26:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:54,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619685707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:54,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:54,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:26:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319140175] [2021-07-09 17:26:55,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:26:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:55,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:26:55,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:26:55,000 INFO L87 Difference]: Start difference. First operand 2301 states and 6655 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:26:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:55,559 INFO L93 Difference]: Finished difference Result 2401 states and 6850 transitions. [2021-07-09 17:26:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:26:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:26:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:55,562 INFO L225 Difference]: With dead ends: 2401 [2021-07-09 17:26:55,562 INFO L226 Difference]: Without dead ends: 2362 [2021-07-09 17:26:55,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 604.5ms TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:26:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-07-09 17:26:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2321. [2021-07-09 17:26:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 2320 states have (on average 2.8922413793103448) internal successors, (6710), 2320 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 6710 transitions. [2021-07-09 17:26:55,592 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 6710 transitions. Word has length 22 [2021-07-09 17:26:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:55,592 INFO L482 AbstractCegarLoop]: Abstraction has 2321 states and 6710 transitions. [2021-07-09 17:26:55,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:26:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 6710 transitions. [2021-07-09 17:26:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:26:55,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:55,595 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:55,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15564,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:55,811 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1610689749, now seen corresponding path program 390 times [2021-07-09 17:26:55,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:55,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210665700] [2021-07-09 17:26:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:55,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210665700] [2021-07-09 17:26:55,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210665700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:55,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007443301] [2021-07-09 17:26:55,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:55,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:26:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:26:55,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:26:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:56,405 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:56,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:26:57,749 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 202 [2021-07-09 17:26:58,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:58,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:26:58,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:26:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:58,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007443301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:26:58,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:26:58,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363206890] [2021-07-09 17:26:58,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:26:58,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:26:58,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:26:58,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:26:58,035 INFO L87 Difference]: Start difference. First operand 2321 states and 6710 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:26:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:26:58,488 INFO L93 Difference]: Finished difference Result 2430 states and 6936 transitions. [2021-07-09 17:26:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:26:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:26:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:26:58,492 INFO L225 Difference]: With dead ends: 2430 [2021-07-09 17:26:58,492 INFO L226 Difference]: Without dead ends: 2414 [2021-07-09 17:26:58,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:26:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-07-09 17:26:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2342. [2021-07-09 17:26:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:26:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-07-09 17:26:58,518 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-07-09 17:26:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:26:58,518 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-07-09 17:26:58,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:26:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-07-09 17:26:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:26:58,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:26:58,521 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:26:58,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16415,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:58,738 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:26:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:26:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash -751815219, now seen corresponding path program 391 times [2021-07-09 17:26:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:26:58,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013520479] [2021-07-09 17:26:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:26:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:26:58,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:26:58,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013520479] [2021-07-09 17:26:58,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013520479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:26:58,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612844395] [2021-07-09 17:26:58,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:26:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:26:58,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:26:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:26:59,293 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:26:59,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:26:59,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:00,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:00,474 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:00,475 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:00,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:01,714 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 266 [2021-07-09 17:27:01,875 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 276 [2021-07-09 17:27:02,120 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 301 [2021-07-09 17:27:02,330 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 301 [2021-07-09 17:27:02,554 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 300 [2021-07-09 17:27:02,847 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 335 [2021-07-09 17:27:04,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:04,381 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:27:04,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:04,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:27:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:04,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612844395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:04,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:04,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:04,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165935533] [2021-07-09 17:27:04,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:04,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:04,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:04,411 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:04,839 INFO L93 Difference]: Finished difference Result 2452 states and 6986 transitions. [2021-07-09 17:27:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:27:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:04,843 INFO L225 Difference]: With dead ends: 2452 [2021-07-09 17:27:04,843 INFO L226 Difference]: Without dead ends: 2442 [2021-07-09 17:27:04,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:27:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-07-09 17:27:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2342. [2021-07-09 17:27:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 2.897052541648868) internal successors, (6782), 2341 states have internal predecessors, (6782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 6782 transitions. [2021-07-09 17:27:04,869 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 6782 transitions. Word has length 22 [2021-07-09 17:27:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:04,869 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 6782 transitions. [2021-07-09 17:27:04,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 6782 transitions. [2021-07-09 17:27:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:04,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:04,871 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:05,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16661 [2021-07-09 17:27:05,087 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1241823813, now seen corresponding path program 392 times [2021-07-09 17:27:05,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:05,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213210400] [2021-07-09 17:27:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:05,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:05,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213210400] [2021-07-09 17:27:05,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213210400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:05,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696250103] [2021-07-09 17:27:05,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:05,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:05,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:05,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:05,700 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:05,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:06,320 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 302 [2021-07-09 17:27:06,436 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 302 [2021-07-09 17:27:06,587 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 313 [2021-07-09 17:27:06,755 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 338 [2021-07-09 17:27:07,634 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 303 [2021-07-09 17:27:07,838 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 330 [2021-07-09 17:27:08,068 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 442 [2021-07-09 17:27:08,300 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 442 [2021-07-09 17:27:08,585 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 447 [2021-07-09 17:27:08,791 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 369 [2021-07-09 17:27:09,328 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 207 [2021-07-09 17:27:09,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:09,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:09,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:27:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:09,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696250103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:09,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:09,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:09,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355791541] [2021-07-09 17:27:09,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:09,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:09,617 INFO L87 Difference]: Start difference. First operand 2342 states and 6782 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:10,152 INFO L93 Difference]: Finished difference Result 2475 states and 7097 transitions. [2021-07-09 17:27:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:27:10,153 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:10,156 INFO L225 Difference]: With dead ends: 2475 [2021-07-09 17:27:10,156 INFO L226 Difference]: Without dead ends: 2459 [2021-07-09 17:27:10,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:27:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-07-09 17:27:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2381. [2021-07-09 17:27:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9063025210084033) internal successors, (6917), 2380 states have internal predecessors, (6917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6917 transitions. [2021-07-09 17:27:10,183 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6917 transitions. Word has length 22 [2021-07-09 17:27:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:10,183 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 6917 transitions. [2021-07-09 17:27:10,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6917 transitions. [2021-07-09 17:27:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:10,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:10,185 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:10,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17243 [2021-07-09 17:27:10,402 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash -382949283, now seen corresponding path program 393 times [2021-07-09 17:27:10,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:10,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820657121] [2021-07-09 17:27:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:10,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:10,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820657121] [2021-07-09 17:27:10,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820657121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:10,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124965548] [2021-07-09 17:27:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:10,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:27:10,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:10,533 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:10,980 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:10,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:11,423 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 175 [2021-07-09 17:27:12,070 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 206 [2021-07-09 17:27:12,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:12,643 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:12,643 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:12,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:13,166 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 202 [2021-07-09 17:27:13,311 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 267 [2021-07-09 17:27:13,414 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 202 [2021-07-09 17:27:14,207 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 209 [2021-07-09 17:27:14,392 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 260 [2021-07-09 17:27:14,702 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 351 [2021-07-09 17:27:14,976 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 351 [2021-07-09 17:27:15,296 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 345 [2021-07-09 17:27:15,407 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 251 [2021-07-09 17:27:16,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:16,141 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:27:16,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:16,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:27:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:16,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124965548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:16,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:16,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:16,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374521595] [2021-07-09 17:27:16,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:16,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:16,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:16,171 INFO L87 Difference]: Start difference. First operand 2381 states and 6917 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:16,747 INFO L93 Difference]: Finished difference Result 2516 states and 7177 transitions. [2021-07-09 17:27:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:27:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:16,751 INFO L225 Difference]: With dead ends: 2516 [2021-07-09 17:27:16,751 INFO L226 Difference]: Without dead ends: 2497 [2021-07-09 17:27:16,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:27:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-07-09 17:27:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2379. [2021-07-09 17:27:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 2.904541631623213) internal successors, (6907), 2378 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 6907 transitions. [2021-07-09 17:27:16,777 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 6907 transitions. Word has length 22 [2021-07-09 17:27:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:16,777 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 6907 transitions. [2021-07-09 17:27:16,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 6907 transitions. [2021-07-09 17:27:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:16,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:16,779 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:16,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17736,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:16,995 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1327664025, now seen corresponding path program 394 times [2021-07-09 17:27:16,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:16,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723417205] [2021-07-09 17:27:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:17,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723417205] [2021-07-09 17:27:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723417205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786720916] [2021-07-09 17:27:17,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:17,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:27:17,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:17,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:17,563 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:17,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:18,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:18,342 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:18,342 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:19,223 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 239 [2021-07-09 17:27:19,370 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-07-09 17:27:19,514 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 250 [2021-07-09 17:27:19,693 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 252 [2021-07-09 17:27:19,878 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 238 [2021-07-09 17:27:20,097 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 170 [2021-07-09 17:27:20,622 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 179 [2021-07-09 17:27:20,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,904 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:27:20,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:20,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:27:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:20,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786720916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:20,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:20,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:20,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323473324] [2021-07-09 17:27:20,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:20,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:20,933 INFO L87 Difference]: Start difference. First operand 2379 states and 6907 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:21,437 INFO L93 Difference]: Finished difference Result 2452 states and 7057 transitions. [2021-07-09 17:27:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:27:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:21,440 INFO L225 Difference]: With dead ends: 2452 [2021-07-09 17:27:21,440 INFO L226 Difference]: Without dead ends: 2442 [2021-07-09 17:27:21,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:27:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-07-09 17:27:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2381. [2021-07-09 17:27:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.9046218487394957) internal successors, (6913), 2380 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6913 transitions. [2021-07-09 17:27:21,466 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6913 transitions. Word has length 22 [2021-07-09 17:27:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:21,466 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 6913 transitions. [2021-07-09 17:27:21,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6913 transitions. [2021-07-09 17:27:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:21,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:21,469 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:21,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18247 [2021-07-09 17:27:21,686 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1415476527, now seen corresponding path program 395 times [2021-07-09 17:27:21,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:21,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428687745] [2021-07-09 17:27:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:27:21,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:21,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428687745] [2021-07-09 17:27:21,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428687745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:21,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682527799] [2021-07-09 17:27:21,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:21,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:27:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:21,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:22,280 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:22,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:22,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:23,397 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 192 [2021-07-09 17:27:23,698 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 250 [2021-07-09 17:27:24,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:24,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:24,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:27:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:24,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682527799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:24,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:24,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 17:27:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259211497] [2021-07-09 17:27:24,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:27:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:27:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:27:24,505 INFO L87 Difference]: Start difference. First operand 2381 states and 6913 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2021-07-09 17:27:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:24,924 INFO L93 Difference]: Finished difference Result 2422 states and 6975 transitions. [2021-07-09 17:27:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:27:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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 22 [2021-07-09 17:27:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:24,928 INFO L225 Difference]: With dead ends: 2422 [2021-07-09 17:27:24,928 INFO L226 Difference]: Without dead ends: 2404 [2021-07-09 17:27:24,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:27:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-07-09 17:27:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2381. [2021-07-09 17:27:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 2.903781512605042) internal successors, (6911), 2380 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 6911 transitions. [2021-07-09 17:27:24,953 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 6911 transitions. Word has length 22 [2021-07-09 17:27:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:24,953 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 6911 transitions. [2021-07-09 17:27:24,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2021-07-09 17:27:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 6911 transitions. [2021-07-09 17:27:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:24,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:24,955 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:25,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18580,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:25,172 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:25,172 INFO L82 PathProgramCache]: Analyzing trace with hash -660249425, now seen corresponding path program 396 times [2021-07-09 17:27:25,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:25,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117560811] [2021-07-09 17:27:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:25,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:25,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117560811] [2021-07-09 17:27:25,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117560811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:25,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261815279] [2021-07-09 17:27:25,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:25,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:27:25,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:25,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:25,766 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:25,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:25,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:27,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:27,903 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:27,904 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:29,488 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 296 [2021-07-09 17:27:29,750 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 329 [2021-07-09 17:27:30,052 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 338 [2021-07-09 17:27:30,392 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 359 [2021-07-09 17:27:30,880 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 408 [2021-07-09 17:27:31,343 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 408 [2021-07-09 17:27:31,869 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 406 [2021-07-09 17:27:32,510 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 475 [2021-07-09 17:27:33,215 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 274 [2021-07-09 17:27:33,664 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 227 [2021-07-09 17:27:33,778 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 252 [2021-07-09 17:27:33,890 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 252 [2021-07-09 17:27:34,012 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 241 [2021-07-09 17:27:34,160 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 259 [2021-07-09 17:27:34,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:34,553 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:27:34,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:34,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:27:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:34,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261815279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:34,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:34,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:34,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333532] [2021-07-09 17:27:34,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:34,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:34,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:34,585 INFO L87 Difference]: Start difference. First operand 2381 states and 6911 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:35,101 INFO L93 Difference]: Finished difference Result 2517 states and 7175 transitions. [2021-07-09 17:27:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:27:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:35,105 INFO L225 Difference]: With dead ends: 2517 [2021-07-09 17:27:35,105 INFO L226 Difference]: Without dead ends: 2507 [2021-07-09 17:27:35,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:27:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-07-09 17:27:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2380. [2021-07-09 17:27:35,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 2.903741067675494) internal successors, (6908), 2379 states have internal predecessors, (6908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 6908 transitions. [2021-07-09 17:27:35,131 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 6908 transitions. Word has length 22 [2021-07-09 17:27:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:35,131 INFO L482 AbstractCegarLoop]: Abstraction has 2380 states and 6908 transitions. [2021-07-09 17:27:35,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 6908 transitions. [2021-07-09 17:27:35,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:35,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:35,133 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:35,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18835,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:35,351 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1603085611, now seen corresponding path program 397 times [2021-07-09 17:27:35,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:35,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173965329] [2021-07-09 17:27:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173965329] [2021-07-09 17:27:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173965329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815845354] [2021-07-09 17:27:35,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:35,491 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:35,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:35,937 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:35,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:35,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:37,212 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 283 [2021-07-09 17:27:37,639 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 362 [2021-07-09 17:27:39,110 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 358 [2021-07-09 17:27:39,385 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 483 [2021-07-09 17:27:40,019 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 686 [2021-07-09 17:27:40,602 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 1075 DAG size of output: 703 [2021-07-09 17:27:41,179 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 1075 DAG size of output: 703 [2021-07-09 17:27:41,799 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 708 [2021-07-09 17:27:42,303 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 696 [2021-07-09 17:27:42,883 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 324 [2021-07-09 17:27:43,481 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 217 [2021-07-09 17:27:43,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:43,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:27:43,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:27:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815845354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115997534] [2021-07-09 17:27:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:43,731 INFO L87 Difference]: Start difference. First operand 2380 states and 6908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:44,240 INFO L93 Difference]: Finished difference Result 2527 states and 7269 transitions. [2021-07-09 17:27:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:27:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:44,243 INFO L225 Difference]: With dead ends: 2527 [2021-07-09 17:27:44,243 INFO L226 Difference]: Without dead ends: 2509 [2021-07-09 17:27:44,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:27:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-07-09 17:27:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2429. [2021-07-09 17:27:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 2.915156507413509) internal successors, (7078), 2428 states have internal predecessors, (7078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7078 transitions. [2021-07-09 17:27:44,270 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7078 transitions. Word has length 22 [2021-07-09 17:27:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:44,270 INFO L482 AbstractCegarLoop]: Abstraction has 2429 states and 7078 transitions. [2021-07-09 17:27:44,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7078 transitions. [2021-07-09 17:27:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:44,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:44,273 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:44,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19485 [2021-07-09 17:27:44,489 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1833007155, now seen corresponding path program 398 times [2021-07-09 17:27:44,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:44,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619990920] [2021-07-09 17:27:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:27:44,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619990920] [2021-07-09 17:27:44,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619990920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75132080] [2021-07-09 17:27:44,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:44,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:27:44,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:44,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:45,032 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:45,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:45,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:46,914 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 295 [2021-07-09 17:27:47,070 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 295 [2021-07-09 17:27:47,294 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 313 [2021-07-09 17:27:47,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:48,128 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:48,129 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:49,255 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 206 [2021-07-09 17:27:49,380 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 227 [2021-07-09 17:27:49,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:27:49,712 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:27:49,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:27:49,712 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:27:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75132080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:49,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:27:49,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:27:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108558477] [2021-07-09 17:27:49,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:27:49,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:27:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:27:49,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:27:49,741 INFO L87 Difference]: Start difference. First operand 2429 states and 7078 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:27:50,603 INFO L93 Difference]: Finished difference Result 2609 states and 7439 transitions. [2021-07-09 17:27:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:27:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:27:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:27:50,607 INFO L225 Difference]: With dead ends: 2609 [2021-07-09 17:27:50,607 INFO L226 Difference]: Without dead ends: 2583 [2021-07-09 17:27:50,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:27:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-07-09 17:27:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2431. [2021-07-09 17:27:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 2.914814814814815) internal successors, (7083), 2430 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:27:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 7083 transitions. [2021-07-09 17:27:50,636 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 7083 transitions. Word has length 22 [2021-07-09 17:27:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:27:50,636 INFO L482 AbstractCegarLoop]: Abstraction has 2431 states and 7083 transitions. [2021-07-09 17:27:50,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:27:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 7083 transitions. [2021-07-09 17:27:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:27:50,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:27:50,639 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:27:50,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20340,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:50,853 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:27:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:27:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash -122393847, now seen corresponding path program 399 times [2021-07-09 17:27:50,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:27:50,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754251843] [2021-07-09 17:27:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:27:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:27:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:27:50,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:27:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754251843] [2021-07-09 17:27:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754251843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:27:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94404610] [2021-07-09 17:27:50,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:27:50,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:27:50,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:27:50,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:27:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:27:51,453 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:27:51,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:27:51,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:27:51,997 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 280 [2021-07-09 17:27:52,102 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 280 [2021-07-09 17:27:52,221 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 291 [2021-07-09 17:27:52,391 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 353 [2021-07-09 17:27:53,514 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 221 [2021-07-09 17:27:53,639 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 268 [2021-07-09 17:27:53,842 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 388 [2021-07-09 17:27:54,041 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 662 DAG size of output: 388 [2021-07-09 17:27:54,291 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 669 DAG size of output: 395 [2021-07-09 17:27:54,484 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 372 [2021-07-09 17:27:55,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:27:55,536 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:27:55,537 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:27:55,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:27:56,192 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 272 [2021-07-09 17:27:57,037 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 208 [2021-07-09 17:27:57,152 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 255 [2021-07-09 17:27:57,330 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 273 [2021-07-09 17:27:57,445 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 215 [2021-07-09 17:27:58,772 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 271 [2021-07-09 17:27:58,959 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 326 [2021-07-09 17:27:59,318 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 471 [2021-07-09 17:27:59,834 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 926 DAG size of output: 538 [2021-07-09 17:28:00,457 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 986 DAG size of output: 563 [2021-07-09 17:28:01,063 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 986 DAG size of output: 563 [2021-07-09 17:28:01,745 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 567 [2021-07-09 17:28:02,585 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 687 [2021-07-09 17:28:03,746 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 469 [2021-07-09 17:28:04,355 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 242 [2021-07-09 17:28:04,577 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 226 [2021-07-09 17:28:04,791 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 286 [2021-07-09 17:28:05,017 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 286 [2021-07-09 17:28:05,250 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 285 [2021-07-09 17:28:05,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:05,879 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:28:05,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:05,879 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:28:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:05,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94404610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:05,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:05,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:28:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597494093] [2021-07-09 17:28:05,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:28:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:28:05,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:05,908 INFO L87 Difference]: Start difference. First operand 2431 states and 7083 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:06,701 INFO L93 Difference]: Finished difference Result 2675 states and 7586 transitions. [2021-07-09 17:28:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:28:06,701 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:28:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:06,706 INFO L225 Difference]: With dead ends: 2675 [2021-07-09 17:28:06,706 INFO L226 Difference]: Without dead ends: 2642 [2021-07-09 17:28:06,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 666.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1525, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:28:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-07-09 17:28:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2423. [2021-07-09 17:28:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.911643270024773) internal successors, (7052), 2422 states have internal predecessors, (7052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 7052 transitions. [2021-07-09 17:28:06,739 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 7052 transitions. Word has length 22 [2021-07-09 17:28:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:06,740 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 7052 transitions. [2021-07-09 17:28:06,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 7052 transitions. [2021-07-09 17:28:06,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:06,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:06,742 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:06,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20835,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:06,945 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1367011149, now seen corresponding path program 400 times [2021-07-09 17:28:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723847459] [2021-07-09 17:28:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:07,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:07,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723847459] [2021-07-09 17:28:07,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723847459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:07,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298398913] [2021-07-09 17:28:07,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:07,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:07,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:07,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:07,541 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:07,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:07,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:08,157 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 298 [2021-07-09 17:28:08,259 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 298 [2021-07-09 17:28:08,378 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 307 [2021-07-09 17:28:09,236 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 221 [2021-07-09 17:28:09,341 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 221 [2021-07-09 17:28:09,458 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 227 [2021-07-09 17:28:10,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:10,465 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:28:10,466 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:28:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:28:11,179 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 310 [2021-07-09 17:28:11,298 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 292 [2021-07-09 17:28:11,862 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 300 [2021-07-09 17:28:11,975 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 300 [2021-07-09 17:28:12,115 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 302 [2021-07-09 17:28:12,284 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 231 [2021-07-09 17:28:13,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:13,151 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:28:13,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:13,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:28:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:13,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298398913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:13,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:13,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:28:13,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556196237] [2021-07-09 17:28:13,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:28:13,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:28:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:13,182 INFO L87 Difference]: Start difference. First operand 2423 states and 7052 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:13,805 INFO L93 Difference]: Finished difference Result 2564 states and 7348 transitions. [2021-07-09 17:28:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:28:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:28:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:13,808 INFO L225 Difference]: With dead ends: 2564 [2021-07-09 17:28:13,808 INFO L226 Difference]: Without dead ends: 2554 [2021-07-09 17:28:13,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:28:13,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-07-09 17:28:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2425. [2021-07-09 17:28:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.9117161716171616) internal successors, (7058), 2424 states have internal predecessors, (7058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7058 transitions. [2021-07-09 17:28:13,834 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7058 transitions. Word has length 22 [2021-07-09 17:28:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:13,834 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7058 transitions. [2021-07-09 17:28:13,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7058 transitions. [2021-07-09 17:28:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:13,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:13,837 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:14,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21852 [2021-07-09 17:28:14,053 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash -80298279, now seen corresponding path program 401 times [2021-07-09 17:28:14,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:14,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127072524] [2021-07-09 17:28:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:28:14,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127072524] [2021-07-09 17:28:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127072524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:14,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885944197] [2021-07-09 17:28:14,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:14,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:28:14,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:14,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:14,604 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:14,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:14,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:15,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:15,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:15,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:28:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885944197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:15,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:15,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 17:28:15,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945295772] [2021-07-09 17:28:15,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:28:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:15,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:28:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:28:15,856 INFO L87 Difference]: Start difference. First operand 2425 states and 7058 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2021-07-09 17:28:16,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:16,201 INFO L93 Difference]: Finished difference Result 2464 states and 7117 transitions. [2021-07-09 17:28:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:28:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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 22 [2021-07-09 17:28:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:16,204 INFO L225 Difference]: With dead ends: 2464 [2021-07-09 17:28:16,204 INFO L226 Difference]: Without dead ends: 2446 [2021-07-09 17:28:16,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:28:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-07-09 17:28:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2425. [2021-07-09 17:28:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 2.911303630363036) internal successors, (7057), 2424 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 7057 transitions. [2021-07-09 17:28:16,230 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 7057 transitions. Word has length 22 [2021-07-09 17:28:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:16,230 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 7057 transitions. [2021-07-09 17:28:16,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2021-07-09 17:28:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 7057 transitions. [2021-07-09 17:28:16,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:16,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:16,232 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:16,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22414 [2021-07-09 17:28:16,449 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash -128763657, now seen corresponding path program 402 times [2021-07-09 17:28:16,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:16,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417847765] [2021-07-09 17:28:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:16,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:16,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417847765] [2021-07-09 17:28:16,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417847765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:16,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432663877] [2021-07-09 17:28:16,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:16,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:28:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:16,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:16,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:17,463 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 288 [2021-07-09 17:28:17,662 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 304 [2021-07-09 17:28:17,772 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 304 [2021-07-09 17:28:17,906 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 315 [2021-07-09 17:28:18,090 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 361 [2021-07-09 17:28:18,240 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 203 [2021-07-09 17:28:19,112 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 293 [2021-07-09 17:28:19,352 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 385 [2021-07-09 17:28:19,576 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 385 [2021-07-09 17:28:19,842 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 390 [2021-07-09 17:28:19,970 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 266 [2021-07-09 17:28:20,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:21,237 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:28:21,238 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:28:21,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:28:21,952 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 184 [2021-07-09 17:28:22,158 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 207 [2021-07-09 17:28:23,262 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 239 [2021-07-09 17:28:23,382 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 239 [2021-07-09 17:28:23,550 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 244 [2021-07-09 17:28:24,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:24,153 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:28:24,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:24,153 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:28:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:24,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432663877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:24,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:24,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:28:24,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433681960] [2021-07-09 17:28:24,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:28:24,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:24,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:28:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:24,181 INFO L87 Difference]: Start difference. First operand 2425 states and 7057 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:24,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:24,862 INFO L93 Difference]: Finished difference Result 2669 states and 7612 transitions. [2021-07-09 17:28:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:28:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:28:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:24,866 INFO L225 Difference]: With dead ends: 2669 [2021-07-09 17:28:24,866 INFO L226 Difference]: Without dead ends: 2659 [2021-07-09 17:28:24,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:28:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-07-09 17:28:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2426. [2021-07-09 17:28:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 2.9117525773195876) internal successors, (7061), 2425 states have internal predecessors, (7061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 7061 transitions. [2021-07-09 17:28:24,894 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 7061 transitions. Word has length 22 [2021-07-09 17:28:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:24,894 INFO L482 AbstractCegarLoop]: Abstraction has 2426 states and 7061 transitions. [2021-07-09 17:28:24,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 7061 transitions. [2021-07-09 17:28:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:24,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:24,897 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:25,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22653 [2021-07-09 17:28:25,113 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash -399035461, now seen corresponding path program 403 times [2021-07-09 17:28:25,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:25,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145330054] [2021-07-09 17:28:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:25,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:25,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145330054] [2021-07-09 17:28:25,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145330054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:25,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400408528] [2021-07-09 17:28:25,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:25,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:25,707 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:25,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:25,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:26,682 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 250 [2021-07-09 17:28:27,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:27,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:28:27,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:28:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:27,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400408528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:27,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:27,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:28:27,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443926281] [2021-07-09 17:28:27,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:28:27,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:27,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:28:27,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:27,205 INFO L87 Difference]: Start difference. First operand 2426 states and 7061 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:28:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:27,705 INFO L93 Difference]: Finished difference Result 2557 states and 7399 transitions. [2021-07-09 17:28:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:28:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:28:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:27,709 INFO L225 Difference]: With dead ends: 2557 [2021-07-09 17:28:27,710 INFO L226 Difference]: Without dead ends: 2541 [2021-07-09 17:28:27,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:28:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-07-09 17:28:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2477. [2021-07-09 17:28:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 2.9232633279483036) internal successors, (7238), 2476 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 7238 transitions. [2021-07-09 17:28:27,745 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 7238 transitions. Word has length 22 [2021-07-09 17:28:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:27,745 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 7238 transitions. [2021-07-09 17:28:27,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:28:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 7238 transitions. [2021-07-09 17:28:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:27,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:27,748 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:27,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23353,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:27,965 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:27,965 INFO L82 PathProgramCache]: Analyzing trace with hash 459839069, now seen corresponding path program 404 times [2021-07-09 17:28:27,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:27,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004221860] [2021-07-09 17:28:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:28,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:28,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004221860] [2021-07-09 17:28:28,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004221860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:28,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153155532] [2021-07-09 17:28:28,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:28,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:28:28,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:28,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:28,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:28,524 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:28,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:28,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:28,991 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 229 [2021-07-09 17:28:30,327 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 307 [2021-07-09 17:28:30,480 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 307 [2021-07-09 17:28:30,652 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 312 [2021-07-09 17:28:30,788 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 288 [2021-07-09 17:28:31,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:31,832 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:28:31,833 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:28:31,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:28:33,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:33,568 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:28:33,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:33,568 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:28:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:33,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153155532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:33,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:33,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:28:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600263134] [2021-07-09 17:28:33,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:28:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:28:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:33,595 INFO L87 Difference]: Start difference. First operand 2477 states and 7238 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:28:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:34,315 INFO L93 Difference]: Finished difference Result 2676 states and 7671 transitions. [2021-07-09 17:28:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:28:34,315 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:28:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:34,319 INFO L225 Difference]: With dead ends: 2676 [2021-07-09 17:28:34,319 INFO L226 Difference]: Without dead ends: 2650 [2021-07-09 17:28:34,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:28:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-07-09 17:28:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2483. [2021-07-09 17:28:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.9234488315874296) internal successors, (7256), 2482 states have internal predecessors, (7256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7256 transitions. [2021-07-09 17:28:34,353 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7256 transitions. Word has length 22 [2021-07-09 17:28:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:34,353 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 7256 transitions. [2021-07-09 17:28:34,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:28:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7256 transitions. [2021-07-09 17:28:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:34,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:34,356 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:34,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23564 [2021-07-09 17:28:34,573 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:34,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2124514919, now seen corresponding path program 405 times [2021-07-09 17:28:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:34,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437113856] [2021-07-09 17:28:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:28:34,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:34,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437113856] [2021-07-09 17:28:34,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437113856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:34,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230394288] [2021-07-09 17:28:34,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:34,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:28:34,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:34,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:34,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:35,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:35,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:36,474 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 257 [2021-07-09 17:28:36,629 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 281 [2021-07-09 17:28:37,062 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 347 [2021-07-09 17:28:37,331 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 433 [2021-07-09 17:28:37,597 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 433 [2021-07-09 17:28:37,923 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 438 [2021-07-09 17:28:38,226 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 513 [2021-07-09 17:28:38,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:39,141 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:28:39,142 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:28:39,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:28:39,790 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 282 [2021-07-09 17:28:40,728 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 253 [2021-07-09 17:28:40,906 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-07-09 17:28:41,547 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 210 [2021-07-09 17:28:41,710 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 234 [2021-07-09 17:28:42,020 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 389 [2021-07-09 17:28:42,358 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 389 [2021-07-09 17:28:42,733 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 554 DAG size of output: 395 [2021-07-09 17:28:43,241 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 521 [2021-07-09 17:28:44,268 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 241 [2021-07-09 17:28:45,328 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 257 [2021-07-09 17:28:45,560 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 371 [2021-07-09 17:28:45,817 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 371 [2021-07-09 17:28:46,005 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 284 [2021-07-09 17:28:46,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:46,418 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:28:46,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:46,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:28:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230394288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:46,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:46,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:28:46,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745287485] [2021-07-09 17:28:46,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:28:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:28:46,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:28:46,447 INFO L87 Difference]: Start difference. First operand 2483 states and 7256 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:28:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:47,201 INFO L93 Difference]: Finished difference Result 2619 states and 7552 transitions. [2021-07-09 17:28:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:28:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:28:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:47,206 INFO L225 Difference]: With dead ends: 2619 [2021-07-09 17:28:47,206 INFO L226 Difference]: Without dead ends: 2609 [2021-07-09 17:28:47,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:28:47,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-07-09 17:28:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2498. [2021-07-09 17:28:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.924309171005206) internal successors, (7302), 2497 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 7302 transitions. [2021-07-09 17:28:47,241 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 7302 transitions. Word has length 22 [2021-07-09 17:28:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:47,241 INFO L482 AbstractCegarLoop]: Abstraction has 2498 states and 7302 transitions. [2021-07-09 17:28:47,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:28:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 7302 transitions. [2021-07-09 17:28:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:47,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:47,244 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:47,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24137 [2021-07-09 17:28:47,457 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash -635109923, now seen corresponding path program 406 times [2021-07-09 17:28:47,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:47,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715831628] [2021-07-09 17:28:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:47,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:47,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715831628] [2021-07-09 17:28:47,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715831628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:47,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946851309] [2021-07-09 17:28:47,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:47,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:28:47,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:47,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:48,108 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:48,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:48,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:48,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:49,012 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:28:49,012 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:28:49,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:28:49,849 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 194 [2021-07-09 17:28:50,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:28:50,511 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:28:50,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:28:50,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:28:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946851309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:50,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:28:50,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:28:50,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306709785] [2021-07-09 17:28:50,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:28:50,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:28:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:28:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:28:50,542 INFO L87 Difference]: Start difference. First operand 2498 states and 7302 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:28:51,409 INFO L93 Difference]: Finished difference Result 2729 states and 7824 transitions. [2021-07-09 17:28:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:28:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:28:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:28:51,413 INFO L225 Difference]: With dead ends: 2729 [2021-07-09 17:28:51,413 INFO L226 Difference]: Without dead ends: 2700 [2021-07-09 17:28:51,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 802.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:28:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2021-07-09 17:28:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2493. [2021-07-09 17:28:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.923354735152488) internal successors, (7285), 2492 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:28:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7285 transitions. [2021-07-09 17:28:51,446 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7285 transitions. Word has length 22 [2021-07-09 17:28:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:28:51,447 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 7285 transitions. [2021-07-09 17:28:51,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:28:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7285 transitions. [2021-07-09 17:28:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:28:51,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:28:51,449 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:28:51,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25258 [2021-07-09 17:28:51,666 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:28:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:28:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1708195303, now seen corresponding path program 407 times [2021-07-09 17:28:51,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:28:51,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023004511] [2021-07-09 17:28:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:28:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:28:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:28:51,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:28:51,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023004511] [2021-07-09 17:28:51,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023004511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:28:51,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063118393] [2021-07-09 17:28:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:28:51,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:28:51,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:28:51,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:28:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:28:52,343 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:28:52,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:28:52,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:28:53,022 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 271 [2021-07-09 17:28:53,143 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 271 [2021-07-09 17:28:53,310 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 278 [2021-07-09 17:28:53,423 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 273 [2021-07-09 17:28:54,235 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 209 [2021-07-09 17:28:54,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:28:55,030 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:28:55,031 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:28:55,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:28:56,028 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 278 [2021-07-09 17:28:56,276 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 393 [2021-07-09 17:28:56,477 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 393 [2021-07-09 17:28:56,731 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 401 [2021-07-09 17:28:57,207 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 626 [2021-07-09 17:28:57,572 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 455 [2021-07-09 17:28:58,808 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 350 [2021-07-09 17:28:59,094 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 394 [2021-07-09 17:29:00,069 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 321 [2021-07-09 17:29:00,589 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 563 [2021-07-09 17:29:01,232 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 1008 DAG size of output: 764 [2021-07-09 17:29:02,363 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 360 [2021-07-09 17:29:02,516 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 278 [2021-07-09 17:29:03,607 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 296 [2021-07-09 17:29:03,860 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 340 [2021-07-09 17:29:04,179 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 444 [2021-07-09 17:29:04,754 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 882 DAG size of output: 687 [2021-07-09 17:29:06,061 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1727 DAG size of output: 1179 [2021-07-09 17:29:07,329 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 1727 DAG size of output: 1179 [2021-07-09 17:29:08,897 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1733 DAG size of output: 1185 [2021-07-09 17:29:10,037 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 1187 DAG size of output: 1085 [2021-07-09 17:29:10,386 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 521 [2021-07-09 17:29:10,790 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 425 [2021-07-09 17:29:11,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:11,611 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:29:11,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:11,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:29:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:11,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063118393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:11,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:11,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:29:11,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873087075] [2021-07-09 17:29:11,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:29:11,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:29:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:11,638 INFO L87 Difference]: Start difference. First operand 2493 states and 7285 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:29:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:12,125 INFO L93 Difference]: Finished difference Result 2656 states and 7653 transitions. [2021-07-09 17:29:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:29:12,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:29:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:12,129 INFO L225 Difference]: With dead ends: 2656 [2021-07-09 17:29:12,129 INFO L226 Difference]: Without dead ends: 2646 [2021-07-09 17:29:12,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:29:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-07-09 17:29:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2494. [2021-07-09 17:29:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 2.923385479342158) internal successors, (7288), 2493 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 7288 transitions. [2021-07-09 17:29:12,155 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 7288 transitions. Word has length 22 [2021-07-09 17:29:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:12,155 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 7288 transitions. [2021-07-09 17:29:12,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:29:12,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 7288 transitions. [2021-07-09 17:29:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:12,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:12,158 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:12,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25595 [2021-07-09 17:29:12,373 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:12,373 INFO L82 PathProgramCache]: Analyzing trace with hash 18563529, now seen corresponding path program 408 times [2021-07-09 17:29:12,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:12,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455906802] [2021-07-09 17:29:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:12,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455906802] [2021-07-09 17:29:12,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455906802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:12,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606076962] [2021-07-09 17:29:12,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:12,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:29:12,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:12,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:29:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:12,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:12,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:13,533 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 213 [2021-07-09 17:29:13,832 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 251 [2021-07-09 17:29:14,049 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 256 [2021-07-09 17:29:14,167 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 283 [2021-07-09 17:29:14,275 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 230 [2021-07-09 17:29:15,070 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 247 [2021-07-09 17:29:15,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:15,581 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:29:15,581 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:29:15,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:29:17,153 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 291 [2021-07-09 17:29:17,343 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 291 [2021-07-09 17:29:17,557 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 286 [2021-07-09 17:29:17,751 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 298 [2021-07-09 17:29:18,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:18,246 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:29:18,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:18,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:29:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:18,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606076962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:18,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:18,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:29:18,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112135685] [2021-07-09 17:29:18,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:29:18,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:18,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:29:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:18,275 INFO L87 Difference]: Start difference. First operand 2494 states and 7288 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:29:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:19,043 INFO L93 Difference]: Finished difference Result 2719 states and 7749 transitions. [2021-07-09 17:29:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:29:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:29:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:19,047 INFO L225 Difference]: With dead ends: 2719 [2021-07-09 17:29:19,047 INFO L226 Difference]: Without dead ends: 2697 [2021-07-09 17:29:19,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:29:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-07-09 17:29:19,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2493. [2021-07-09 17:29:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 2.92215088282504) internal successors, (7282), 2492 states have internal predecessors, (7282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 7282 transitions. [2021-07-09 17:29:19,079 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 7282 transitions. Word has length 22 [2021-07-09 17:29:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:19,080 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 7282 transitions. [2021-07-09 17:29:19,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:29:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 7282 transitions. [2021-07-09 17:29:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:19,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:19,082 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:19,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26889,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,297 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1507968525, now seen corresponding path program 409 times [2021-07-09 17:29:19,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:19,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406123411] [2021-07-09 17:29:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:19,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406123411] [2021-07-09 17:29:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406123411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117028879] [2021-07-09 17:29:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:19,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:29:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:19,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:20,543 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 256 [2021-07-09 17:29:20,789 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 301 [2021-07-09 17:29:21,650 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 269 [2021-07-09 17:29:22,228 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 251 [2021-07-09 17:29:22,750 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 232 [2021-07-09 17:29:22,953 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-07-09 17:29:23,271 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 391 [2021-07-09 17:29:23,607 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 391 [2021-07-09 17:29:23,963 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 396 [2021-07-09 17:29:24,374 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 478 [2021-07-09 17:29:24,816 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 275 [2021-07-09 17:29:24,932 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 275 [2021-07-09 17:29:25,059 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 278 [2021-07-09 17:29:25,186 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-07-09 17:29:25,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:25,573 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:29:25,573 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:29:25,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:29:26,169 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 233 [2021-07-09 17:29:26,811 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 276 [2021-07-09 17:29:27,053 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 308 [2021-07-09 17:29:27,248 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 308 [2021-07-09 17:29:27,476 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 312 [2021-07-09 17:29:27,750 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 361 [2021-07-09 17:29:28,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,397 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:29:28,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:28,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:29:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:28,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117028879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:28,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:28,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:29:28,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332130797] [2021-07-09 17:29:28,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:29:28,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:29:28,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:28,429 INFO L87 Difference]: Start difference. First operand 2493 states and 7282 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:29:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:29,124 INFO L93 Difference]: Finished difference Result 2781 states and 7913 transitions. [2021-07-09 17:29:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:29:29,124 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:29:29,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:29,128 INFO L225 Difference]: With dead ends: 2781 [2021-07-09 17:29:29,128 INFO L226 Difference]: Without dead ends: 2752 [2021-07-09 17:29:29,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 654.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:29:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-07-09 17:29:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2480. [2021-07-09 17:29:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.919322307382009) internal successors, (7237), 2479 states have internal predecessors, (7237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 7237 transitions. [2021-07-09 17:29:29,160 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 7237 transitions. Word has length 22 [2021-07-09 17:29:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:29,160 INFO L482 AbstractCegarLoop]: Abstraction has 2480 states and 7237 transitions. [2021-07-09 17:29:29,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:29:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 7237 transitions. [2021-07-09 17:29:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:29,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:29,163 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:29,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27455,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:29,366 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash 434883145, now seen corresponding path program 410 times [2021-07-09 17:29:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:29,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214355631] [2021-07-09 17:29:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:29,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:29,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214355631] [2021-07-09 17:29:29,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214355631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:29,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899442596] [2021-07-09 17:29:29,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:29,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:29:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:29,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:29:29,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:29,951 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:29,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:29,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:30,722 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 232 [2021-07-09 17:29:31,031 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 269 [2021-07-09 17:29:31,267 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 306 [2021-07-09 17:29:31,996 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 290 [2021-07-09 17:29:32,168 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 351 [2021-07-09 17:29:32,375 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 349 [2021-07-09 17:29:32,588 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 329 [2021-07-09 17:29:32,730 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 222 [2021-07-09 17:29:33,240 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 247 [2021-07-09 17:29:33,661 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 491 [2021-07-09 17:29:34,211 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 194 [2021-07-09 17:29:34,934 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 314 [2021-07-09 17:29:35,610 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 678 [2021-07-09 17:29:36,280 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 678 [2021-07-09 17:29:37,107 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 685 [2021-07-09 17:29:37,976 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 741 [2021-07-09 17:29:38,266 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 377 [2021-07-09 17:29:38,438 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 218 [2021-07-09 17:29:39,137 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 223 [2021-07-09 17:29:39,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:39,470 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:29:39,471 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:29:39,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:29:40,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:40,649 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:29:40,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:40,650 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:29:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899442596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:40,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:40,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:29:40,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134190532] [2021-07-09 17:29:40,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:29:40,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:29:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:29:40,678 INFO L87 Difference]: Start difference. First operand 2480 states and 7237 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:29:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:41,339 INFO L93 Difference]: Finished difference Result 2723 states and 7787 transitions. [2021-07-09 17:29:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:29:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:29:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:41,343 INFO L225 Difference]: With dead ends: 2723 [2021-07-09 17:29:41,344 INFO L226 Difference]: Without dead ends: 2713 [2021-07-09 17:29:41,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 678.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:29:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-07-09 17:29:41,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2482. [2021-07-09 17:29:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 2.9185812172511083) internal successors, (7241), 2481 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 7241 transitions. [2021-07-09 17:29:41,376 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 7241 transitions. Word has length 22 [2021-07-09 17:29:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:41,376 INFO L482 AbstractCegarLoop]: Abstraction has 2482 states and 7241 transitions. [2021-07-09 17:29:41,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:29:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 7241 transitions. [2021-07-09 17:29:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:41,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:41,379 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:41,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28155 [2021-07-09 17:29:41,588 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:41,588 INFO L82 PathProgramCache]: Analyzing trace with hash -832574033, now seen corresponding path program 411 times [2021-07-09 17:29:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:41,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733539277] [2021-07-09 17:29:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:41,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733539277] [2021-07-09 17:29:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733539277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101716822] [2021-07-09 17:29:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:41,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:29:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:41,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:29:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:42,145 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:29:42,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:42,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:42,839 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-07-09 17:29:43,030 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 378 [2021-07-09 17:29:43,811 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 280 [2021-07-09 17:29:43,932 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 280 [2021-07-09 17:29:44,179 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 300 [2021-07-09 17:29:44,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:45,125 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:29:45,126 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:29:45,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:29:45,734 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 224 [2021-07-09 17:29:46,702 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 187 [2021-07-09 17:29:46,927 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 206 [2021-07-09 17:29:48,022 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 230 [2021-07-09 17:29:48,194 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 283 [2021-07-09 17:29:48,432 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 336 [2021-07-09 17:29:48,757 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 351 [2021-07-09 17:29:49,340 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 413 [2021-07-09 17:29:49,886 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 413 [2021-07-09 17:29:50,555 WARN L205 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 419 [2021-07-09 17:29:50,870 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 282 [2021-07-09 17:29:51,161 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 303 [2021-07-09 17:29:52,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:29:52,159 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:29:52,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:29:52,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:29:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:52,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101716822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:52,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:52,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:29:52,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093328043] [2021-07-09 17:29:52,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:29:52,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:29:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:29:52,191 INFO L87 Difference]: Start difference. First operand 2482 states and 7241 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:29:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:53,131 INFO L93 Difference]: Finished difference Result 2895 states and 8241 transitions. [2021-07-09 17:29:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:29:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:29:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:53,136 INFO L225 Difference]: With dead ends: 2895 [2021-07-09 17:29:53,136 INFO L226 Difference]: Without dead ends: 2885 [2021-07-09 17:29:53,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 771.2ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:29:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-07-09 17:29:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2483. [2021-07-09 17:29:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.91941982272361) internal successors, (7246), 2482 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 7246 transitions. [2021-07-09 17:29:53,179 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 7246 transitions. Word has length 22 [2021-07-09 17:29:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:53,179 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 7246 transitions. [2021-07-09 17:29:53,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:29:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 7246 transitions. [2021-07-09 17:29:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:53,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:53,182 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:53,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28822 [2021-07-09 17:29:53,384 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1959720747, now seen corresponding path program 412 times [2021-07-09 17:29:53,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:53,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099029340] [2021-07-09 17:29:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:53,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:53,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099029340] [2021-07-09 17:29:53,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099029340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:53,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157137096] [2021-07-09 17:29:53,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:53,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:29:53,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:53,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:29:53,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:29:53,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:53,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:29:54,343 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 221 [2021-07-09 17:29:55,912 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 328 [2021-07-09 17:29:56,200 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 450 [2021-07-09 17:29:56,532 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 755 DAG size of output: 488 [2021-07-09 17:29:56,846 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 755 DAG size of output: 488 [2021-07-09 17:29:57,214 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 760 DAG size of output: 493 [2021-07-09 17:29:57,469 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 433 [2021-07-09 17:29:57,609 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 281 [2021-07-09 17:29:58,539 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 223 [2021-07-09 17:29:58,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:29:58,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:29:58,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:29:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:29:58,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157137096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:58,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:29:58,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:29:58,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256882816] [2021-07-09 17:29:58,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:29:58,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:29:58,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:29:58,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:29:58,782 INFO L87 Difference]: Start difference. First operand 2483 states and 7246 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:29:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:29:59,222 INFO L93 Difference]: Finished difference Result 2645 states and 7685 transitions. [2021-07-09 17:29:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:29:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:29:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:29:59,226 INFO L225 Difference]: With dead ends: 2645 [2021-07-09 17:29:59,226 INFO L226 Difference]: Without dead ends: 2627 [2021-07-09 17:29:59,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:29:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-07-09 17:29:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2561. [2021-07-09 17:29:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.933984375) internal successors, (7511), 2560 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:29:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 7511 transitions. [2021-07-09 17:29:59,255 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 7511 transitions. Word has length 22 [2021-07-09 17:29:59,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:29:59,255 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 7511 transitions. [2021-07-09 17:29:59,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:29:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 7511 transitions. [2021-07-09 17:29:59,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:29:59,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:29:59,257 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:29:59,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29593 [2021-07-09 17:29:59,473 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:29:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:29:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1476372019, now seen corresponding path program 413 times [2021-07-09 17:29:59,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:29:59,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561432918] [2021-07-09 17:29:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:29:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:29:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:29:59,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:29:59,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561432918] [2021-07-09 17:29:59,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561432918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:29:59,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432411368] [2021-07-09 17:29:59,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:29:59,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:29:59,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:29:59,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:29:59,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:00,039 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:00,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:00,445 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 212 [2021-07-09 17:30:01,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:01,947 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:01,948 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:01,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:02,633 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 213 [2021-07-09 17:30:03,379 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 231 [2021-07-09 17:30:03,617 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 265 [2021-07-09 17:30:04,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:04,611 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:04,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:04,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:04,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432411368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:04,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:04,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:30:04,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015172017] [2021-07-09 17:30:04,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:30:04,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:30:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:30:04,645 INFO L87 Difference]: Start difference. First operand 2561 states and 7511 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:30:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:05,905 INFO L93 Difference]: Finished difference Result 2850 states and 8157 transitions. [2021-07-09 17:30:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:30:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:30:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:05,910 INFO L225 Difference]: With dead ends: 2850 [2021-07-09 17:30:05,910 INFO L226 Difference]: Without dead ends: 2817 [2021-07-09 17:30:05,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 910.6ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:30:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-07-09 17:30:05,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2572. [2021-07-09 17:30:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2572 states, 2571 states have (on average 2.9362115908206925) internal successors, (7549), 2571 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2572 states to 2572 states and 7549 transitions. [2021-07-09 17:30:05,945 INFO L78 Accepts]: Start accepts. Automaton has 2572 states and 7549 transitions. Word has length 22 [2021-07-09 17:30:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:05,945 INFO L482 AbstractCegarLoop]: Abstraction has 2572 states and 7549 transitions. [2021-07-09 17:30:05,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:30:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2572 states and 7549 transitions. [2021-07-09 17:30:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:05,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:05,948 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30257 [2021-07-09 17:30:06,164 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash 234241289, now seen corresponding path program 414 times [2021-07-09 17:30:06,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:06,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743588816] [2021-07-09 17:30:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:06,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743588816] [2021-07-09 17:30:06,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743588816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646903766] [2021-07-09 17:30:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:06,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:30:06,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:06,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:06,775 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:06,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:06,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:08,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:08,553 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:08,554 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:08,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:10,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:10,244 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:10,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:10,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:10,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646903766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:10,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:10,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:30:10,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858288901] [2021-07-09 17:30:10,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:30:10,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:10,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:30:10,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:10,274 INFO L87 Difference]: Start difference. First operand 2572 states and 7549 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:30:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:11,693 INFO L93 Difference]: Finished difference Result 3018 states and 8552 transitions. [2021-07-09 17:30:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:30:11,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:30:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:11,699 INFO L225 Difference]: With dead ends: 3018 [2021-07-09 17:30:11,699 INFO L226 Difference]: Without dead ends: 2971 [2021-07-09 17:30:11,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1012.6ms TimeCoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:30:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-07-09 17:30:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 2579. [2021-07-09 17:30:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2578 states have (on average 2.933281613653995) internal successors, (7562), 2578 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 7562 transitions. [2021-07-09 17:30:11,733 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 7562 transitions. Word has length 22 [2021-07-09 17:30:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:11,733 INFO L482 AbstractCegarLoop]: Abstraction has 2579 states and 7562 transitions. [2021-07-09 17:30:11,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:30:11,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 7562 transitions. [2021-07-09 17:30:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:11,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:11,735 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:11,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30881 [2021-07-09 17:30:11,953 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1723646285, now seen corresponding path program 415 times [2021-07-09 17:30:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:11,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658836368] [2021-07-09 17:30:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:12,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:12,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658836368] [2021-07-09 17:30:12,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658836368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:12,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558105011] [2021-07-09 17:30:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:12,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:12,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:12,595 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:12,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:12,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:13,737 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 197 [2021-07-09 17:30:14,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:14,650 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:14,650 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:14,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:15,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:16,012 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:16,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:16,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:16,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558105011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:16,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:16,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:30:16,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552155040] [2021-07-09 17:30:16,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:30:16,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:30:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:16,041 INFO L87 Difference]: Start difference. First operand 2579 states and 7562 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:30:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:16,895 INFO L93 Difference]: Finished difference Result 2793 states and 8044 transitions. [2021-07-09 17:30:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:30:16,895 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:30:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:16,899 INFO L225 Difference]: With dead ends: 2793 [2021-07-09 17:30:16,899 INFO L226 Difference]: Without dead ends: 2778 [2021-07-09 17:30:16,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:30:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-07-09 17:30:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2592. [2021-07-09 17:30:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.932458510227711) internal successors, (7598), 2591 states have internal predecessors, (7598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7598 transitions. [2021-07-09 17:30:16,932 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7598 transitions. Word has length 22 [2021-07-09 17:30:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:16,932 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 7598 transitions. [2021-07-09 17:30:16,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:30:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7598 transitions. [2021-07-09 17:30:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:16,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:16,935 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:17,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31233,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:17,151 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash 650560905, now seen corresponding path program 416 times [2021-07-09 17:30:17,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:17,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238457008] [2021-07-09 17:30:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:17,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:17,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238457008] [2021-07-09 17:30:17,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238457008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:17,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083397199] [2021-07-09 17:30:17,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:17,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:30:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:17,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:17,790 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:17,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:17,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:18,443 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 197 [2021-07-09 17:30:19,344 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 212 [2021-07-09 17:30:19,629 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 240 [2021-07-09 17:30:20,320 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 209 [2021-07-09 17:30:20,458 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 237 [2021-07-09 17:30:20,625 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 273 [2021-07-09 17:30:20,886 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 377 [2021-07-09 17:30:21,239 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 607 DAG size of output: 377 [2021-07-09 17:30:21,669 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 382 [2021-07-09 17:30:22,163 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 500 [2021-07-09 17:30:22,376 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 290 [2021-07-09 17:30:22,656 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 212 [2021-07-09 17:30:22,759 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 212 [2021-07-09 17:30:22,872 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 216 [2021-07-09 17:30:22,985 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 246 [2021-07-09 17:30:23,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:23,509 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:23,510 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:23,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:24,377 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 210 [2021-07-09 17:30:25,141 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 199 [2021-07-09 17:30:25,296 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 201 [2021-07-09 17:30:25,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:25,561 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:25,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:25,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083397199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:25,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:25,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:30:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080347183] [2021-07-09 17:30:25,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:30:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:30:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:25,595 INFO L87 Difference]: Start difference. First operand 2592 states and 7598 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:30:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:26,485 INFO L93 Difference]: Finished difference Result 2874 states and 8265 transitions. [2021-07-09 17:30:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:30:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:30:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:26,489 INFO L225 Difference]: With dead ends: 2874 [2021-07-09 17:30:26,489 INFO L226 Difference]: Without dead ends: 2852 [2021-07-09 17:30:26,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:30:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-07-09 17:30:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2592. [2021-07-09 17:30:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-07-09 17:30:26,519 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-07-09 17:30:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:26,519 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-07-09 17:30:26,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:30:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-07-09 17:30:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:26,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:26,521 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:26,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31625,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,737 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1744652493, now seen corresponding path program 417 times [2021-07-09 17:30:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:26,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768585952] [2021-07-09 17:30:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:26,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768585952] [2021-07-09 17:30:26,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768585952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040893525] [2021-07-09 17:30:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:26,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:30:26,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:26,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:27,388 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:27,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:27,797 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 191 [2021-07-09 17:30:28,748 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 255 [2021-07-09 17:30:29,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:29,917 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:29,918 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:30,568 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 251 [2021-07-09 17:30:30,761 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 254 [2021-07-09 17:30:31,807 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 301 [2021-07-09 17:30:32,028 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 326 [2021-07-09 17:30:32,236 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 326 [2021-07-09 17:30:32,547 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 329 [2021-07-09 17:30:32,804 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 373 [2021-07-09 17:30:33,340 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 186 [2021-07-09 17:30:33,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:33,726 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:33,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:33,726 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:33,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040893525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:33,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:33,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:30:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496051267] [2021-07-09 17:30:33,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:30:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:30:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:33,757 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:30:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:34,550 INFO L93 Difference]: Finished difference Result 2811 states and 8117 transitions. [2021-07-09 17:30:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:30:34,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:30:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:34,554 INFO L225 Difference]: With dead ends: 2811 [2021-07-09 17:30:34,554 INFO L226 Difference]: Without dead ends: 2801 [2021-07-09 17:30:34,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 822.6ms TimeCoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:30:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-07-09 17:30:34,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2592. [2021-07-09 17:30:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.934002315708221) internal successors, (7602), 2591 states have internal predecessors, (7602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 7602 transitions. [2021-07-09 17:30:34,586 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 7602 transitions. Word has length 22 [2021-07-09 17:30:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:34,586 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 7602 transitions. [2021-07-09 17:30:34,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:30:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 7602 transitions. [2021-07-09 17:30:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:34,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:34,590 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:34,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32315 [2021-07-09 17:30:34,807 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash -560398563, now seen corresponding path program 418 times [2021-07-09 17:30:34,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:34,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306762027] [2021-07-09 17:30:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:30:34,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:34,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306762027] [2021-07-09 17:30:34,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306762027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:34,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496845359] [2021-07-09 17:30:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:34,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:30:34,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:34,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:35,405 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:30:35,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:35,765 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 204 [2021-07-09 17:30:36,162 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 221 [2021-07-09 17:30:37,205 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 281 [2021-07-09 17:30:37,364 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 312 [2021-07-09 17:30:38,132 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 417 [2021-07-09 17:30:38,440 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 417 [2021-07-09 17:30:38,756 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 422 [2021-07-09 17:30:39,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:40,141 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:40,141 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:40,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:40,899 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 243 [2021-07-09 17:30:41,825 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 229 [2021-07-09 17:30:41,948 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-07-09 17:30:42,074 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-07-09 17:30:42,256 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 241 [2021-07-09 17:30:43,054 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 149 [2021-07-09 17:30:43,760 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 252 [2021-07-09 17:30:43,996 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 338 [2021-07-09 17:30:44,203 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 338 [2021-07-09 17:30:44,438 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 342 [2021-07-09 17:30:44,542 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 304 [2021-07-09 17:30:44,989 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 186 [2021-07-09 17:30:45,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:45,076 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:45,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:45,076 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:45,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496845359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:45,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:45,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:30:45,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536650518] [2021-07-09 17:30:45,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:30:45,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:45,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:30:45,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:30:45,103 INFO L87 Difference]: Start difference. First operand 2592 states and 7602 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:30:46,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:46,126 INFO L93 Difference]: Finished difference Result 3052 states and 8624 transitions. [2021-07-09 17:30:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:30:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:30:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:46,131 INFO L225 Difference]: With dead ends: 3052 [2021-07-09 17:30:46,131 INFO L226 Difference]: Without dead ends: 3011 [2021-07-09 17:30:46,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:30:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2021-07-09 17:30:46,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2594. [2021-07-09 17:30:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.9298110296953337) internal successors, (7597), 2593 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7597 transitions. [2021-07-09 17:30:46,170 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7597 transitions. Word has length 22 [2021-07-09 17:30:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:46,170 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7597 transitions. [2021-07-09 17:30:46,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:30:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7597 transitions. [2021-07-09 17:30:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:46,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:46,174 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:46,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32866,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,390 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1633483943, now seen corresponding path program 419 times [2021-07-09 17:30:46,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:46,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125294782] [2021-07-09 17:30:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:46,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125294782] [2021-07-09 17:30:46,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125294782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:46,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946662315] [2021-07-09 17:30:46,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:46,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:30:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:46,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:46,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:48,123 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 250 [2021-07-09 17:30:48,259 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 250 [2021-07-09 17:30:48,377 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 256 [2021-07-09 17:30:48,514 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 285 [2021-07-09 17:30:50,143 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 229 [2021-07-09 17:30:50,325 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 331 [2021-07-09 17:30:50,516 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 331 [2021-07-09 17:30:50,726 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 334 [2021-07-09 17:30:50,883 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 318 [2021-07-09 17:30:51,111 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 292 [2021-07-09 17:30:51,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:30:51,604 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:30:51,604 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:30:51,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:30:52,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:30:52,561 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:30:52,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:30:52,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:30:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:52,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946662315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:30:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:30:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207188320] [2021-07-09 17:30:52,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:30:52,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:30:52,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:30:52,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:30:52,590 INFO L87 Difference]: Start difference. First operand 2594 states and 7597 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:30:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:30:53,680 INFO L93 Difference]: Finished difference Result 3138 states and 8959 transitions. [2021-07-09 17:30:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:30:53,681 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:30:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:30:53,685 INFO L225 Difference]: With dead ends: 3138 [2021-07-09 17:30:53,685 INFO L226 Difference]: Without dead ends: 3107 [2021-07-09 17:30:53,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 883.8ms TimeCoverageRelationStatistics Valid=313, Invalid=2443, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:30:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-07-09 17:30:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2554. [2021-07-09 17:30:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.928319623971798) internal successors, (7476), 2553 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:30:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 7476 transitions. [2021-07-09 17:30:53,722 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 7476 transitions. Word has length 22 [2021-07-09 17:30:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:30:53,722 INFO L482 AbstractCegarLoop]: Abstraction has 2554 states and 7476 transitions. [2021-07-09 17:30:53,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:30:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 7476 transitions. [2021-07-09 17:30:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:30:53,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:30:53,725 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:30:53,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33726,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:53,943 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:30:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:30:53,943 INFO L82 PathProgramCache]: Analyzing trace with hash -539392355, now seen corresponding path program 420 times [2021-07-09 17:30:53,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:30:53,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212476829] [2021-07-09 17:30:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:30:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:30:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:30:54,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:30:54,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212476829] [2021-07-09 17:30:54,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212476829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:30:54,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040014008] [2021-07-09 17:30:54,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:30:54,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:30:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:30:54,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:30:54,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:30:54,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:30:54,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:30:55,401 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 428 [2021-07-09 17:30:55,595 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 428 [2021-07-09 17:30:55,789 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 439 [2021-07-09 17:30:56,159 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 598 [2021-07-09 17:30:56,319 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 354 [2021-07-09 17:30:57,376 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 380 [2021-07-09 17:30:57,650 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 433 [2021-07-09 17:30:57,900 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 490 [2021-07-09 17:30:58,318 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 954 DAG size of output: 630 [2021-07-09 17:30:58,701 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 954 DAG size of output: 630 [2021-07-09 17:30:59,148 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 635 [2021-07-09 17:30:59,552 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 719 [2021-07-09 17:30:59,697 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 157 [2021-07-09 17:30:59,914 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 272 [2021-07-09 17:31:00,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:00,488 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:00,489 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:00,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:01,298 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 275 [2021-07-09 17:31:02,160 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 196 [2021-07-09 17:31:02,516 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 140 [2021-07-09 17:31:02,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:02,677 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:31:02,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:02,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:31:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:02,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040014008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:02,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:02,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:31:02,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273015932] [2021-07-09 17:31:02,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:31:02,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:02,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:31:02,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:02,706 INFO L87 Difference]: Start difference. First operand 2554 states and 7476 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:31:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:03,384 INFO L93 Difference]: Finished difference Result 3000 states and 8594 transitions. [2021-07-09 17:31:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:31:03,385 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:31:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:03,388 INFO L225 Difference]: With dead ends: 3000 [2021-07-09 17:31:03,389 INFO L226 Difference]: Without dead ends: 2990 [2021-07-09 17:31:03,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 693.6ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:31:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-07-09 17:31:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2556. [2021-07-09 17:31:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9287671232876713) internal successors, (7483), 2555 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7483 transitions. [2021-07-09 17:31:03,425 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7483 transitions. Word has length 22 [2021-07-09 17:31:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:03,425 INFO L482 AbstractCegarLoop]: Abstraction has 2556 states and 7483 transitions. [2021-07-09 17:31:03,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:31:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7483 transitions. [2021-07-09 17:31:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:03,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:03,427 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:03,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34275,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,644 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2125188711, now seen corresponding path program 421 times [2021-07-09 17:31:03,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:03,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947580140] [2021-07-09 17:31:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:31:03,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947580140] [2021-07-09 17:31:03,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947580140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630029725] [2021-07-09 17:31:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:03,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:03,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:04,202 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:31:04,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:04,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:05,408 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 250 [2021-07-09 17:31:05,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:05,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:05,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:31:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:05,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630029725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:05,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:05,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-07-09 17:31:05,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96315583] [2021-07-09 17:31:05,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:31:05,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:31:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:31:05,939 INFO L87 Difference]: Start difference. First operand 2556 states and 7483 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2021-07-09 17:31:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:06,312 INFO L93 Difference]: Finished difference Result 2587 states and 7530 transitions. [2021-07-09 17:31:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:31:06,313 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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 22 [2021-07-09 17:31:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:06,317 INFO L225 Difference]: With dead ends: 2587 [2021-07-09 17:31:06,317 INFO L226 Difference]: Without dead ends: 2569 [2021-07-09 17:31:06,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:31:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-07-09 17:31:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2556. [2021-07-09 17:31:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 2.9279843444227005) internal successors, (7481), 2555 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 7481 transitions. [2021-07-09 17:31:06,347 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 7481 transitions. Word has length 22 [2021-07-09 17:31:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:06,347 INFO L482 AbstractCegarLoop]: Abstraction has 2556 states and 7481 transitions. [2021-07-09 17:31:06,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 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) [2021-07-09 17:31:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 7481 transitions. [2021-07-09 17:31:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:06,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:06,349 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:06,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34971,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,565 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:06,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:06,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1175859209, now seen corresponding path program 422 times [2021-07-09 17:31:06,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:06,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255006178] [2021-07-09 17:31:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:06,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255006178] [2021-07-09 17:31:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255006178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:06,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841839896] [2021-07-09 17:31:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:06,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:31:06,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:06,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:07,170 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:31:07,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:07,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:08,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:08,252 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:08,253 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:08,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:09,273 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 224 [2021-07-09 17:31:09,403 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 224 [2021-07-09 17:31:09,578 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 232 [2021-07-09 17:31:09,729 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 225 [2021-07-09 17:31:10,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:10,180 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:31:10,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:10,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:31:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:10,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841839896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:10,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:10,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:31:10,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007955204] [2021-07-09 17:31:10,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:31:10,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:31:10,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:31:10,210 INFO L87 Difference]: Start difference. First operand 2556 states and 7481 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:31:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:11,231 INFO L93 Difference]: Finished difference Result 3029 states and 8704 transitions. [2021-07-09 17:31:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:31:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:31:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:11,235 INFO L225 Difference]: With dead ends: 3029 [2021-07-09 17:31:11,235 INFO L226 Difference]: Without dead ends: 3019 [2021-07-09 17:31:11,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 936.6ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:31:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-07-09 17:31:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 2564. [2021-07-09 17:31:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.928209129925868) internal successors, (7505), 2563 states have internal predecessors, (7505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7505 transitions. [2021-07-09 17:31:11,267 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7505 transitions. Word has length 22 [2021-07-09 17:31:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:11,267 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7505 transitions. [2021-07-09 17:31:11,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:31:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7505 transitions. [2021-07-09 17:31:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:11,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:11,270 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:11,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35184,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,485 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2066719163, now seen corresponding path program 423 times [2021-07-09 17:31:11,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:11,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291499961] [2021-07-09 17:31:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:11,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:11,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291499961] [2021-07-09 17:31:11,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291499961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:11,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868811151] [2021-07-09 17:31:11,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:11,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:31:11,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:11,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:11,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:12,091 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:31:12,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:12,770 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 287 [2021-07-09 17:31:12,882 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 287 [2021-07-09 17:31:13,051 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 298 [2021-07-09 17:31:13,250 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 400 [2021-07-09 17:31:13,383 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 304 [2021-07-09 17:31:14,623 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 311 [2021-07-09 17:31:14,856 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 346 [2021-07-09 17:31:15,767 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 280 [2021-07-09 17:31:15,911 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 295 [2021-07-09 17:31:16,099 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 361 [2021-07-09 17:31:17,221 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 717 DAG size of output: 481 [2021-07-09 17:31:17,817 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 722 [2021-07-09 17:31:18,442 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 722 [2021-07-09 17:31:19,124 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 1178 DAG size of output: 727 [2021-07-09 17:31:19,305 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 345 [2021-07-09 17:31:20,013 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 340 [2021-07-09 17:31:20,502 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 307 [2021-07-09 17:31:20,671 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 307 [2021-07-09 17:31:20,827 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 309 [2021-07-09 17:31:21,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:21,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:31:21,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:31:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868811151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:21,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:31:21,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144100169] [2021-07-09 17:31:21,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:31:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:31:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:21,049 INFO L87 Difference]: Start difference. First operand 2564 states and 7505 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:31:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:21,600 INFO L93 Difference]: Finished difference Result 2711 states and 7924 transitions. [2021-07-09 17:31:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:31:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:31:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:21,604 INFO L225 Difference]: With dead ends: 2711 [2021-07-09 17:31:21,604 INFO L226 Difference]: Without dead ends: 2695 [2021-07-09 17:31:21,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:31:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-07-09 17:31:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2645. [2021-07-09 17:31:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.9436459909228443) internal successors, (7783), 2644 states have internal predecessors, (7783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7783 transitions. [2021-07-09 17:31:21,632 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7783 transitions. Word has length 22 [2021-07-09 17:31:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:21,632 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 7783 transitions. [2021-07-09 17:31:21,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:31:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7783 transitions. [2021-07-09 17:31:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:21,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:21,635 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:21,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35559,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,851 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:21,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1369373603, now seen corresponding path program 424 times [2021-07-09 17:31:21,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:21,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015172684] [2021-07-09 17:31:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:21,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:21,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015172684] [2021-07-09 17:31:21,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015172684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:21,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620318044] [2021-07-09 17:31:21,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:21,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:31:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:21,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:22,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:23,011 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 327 [2021-07-09 17:31:23,915 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 207 [2021-07-09 17:31:24,072 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 279 [2021-07-09 17:31:24,360 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 423 [2021-07-09 17:31:24,602 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 423 [2021-07-09 17:31:24,884 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 428 [2021-07-09 17:31:25,102 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 416 [2021-07-09 17:31:26,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:26,711 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:26,712 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:26,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:27,692 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 175 [2021-07-09 17:31:28,476 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 209 [2021-07-09 17:31:28,672 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 295 [2021-07-09 17:31:28,907 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 305 [2021-07-09 17:31:29,141 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 305 [2021-07-09 17:31:29,432 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 310 [2021-07-09 17:31:29,763 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 414 [2021-07-09 17:31:30,508 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 209 [2021-07-09 17:31:31,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:31,097 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:31:31,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:31,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:31:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:31,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620318044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:31,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:31,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:31:31,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150647418] [2021-07-09 17:31:31,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:31:31,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:31,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:31:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:31,125 INFO L87 Difference]: Start difference. First operand 2645 states and 7783 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:31:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:32,194 INFO L93 Difference]: Finished difference Result 2975 states and 8581 transitions. [2021-07-09 17:31:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:31:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:31:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:32,199 INFO L225 Difference]: With dead ends: 2975 [2021-07-09 17:31:32,200 INFO L226 Difference]: Without dead ends: 2942 [2021-07-09 17:31:32,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=304, Invalid=2776, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:31:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-07-09 17:31:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2661. [2021-07-09 17:31:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 2.946240601503759) internal successors, (7837), 2660 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 7837 transitions. [2021-07-09 17:31:32,231 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 7837 transitions. Word has length 22 [2021-07-09 17:31:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:32,231 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 7837 transitions. [2021-07-09 17:31:32,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:31:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 7837 transitions. [2021-07-09 17:31:32,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:32,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:32,233 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:32,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36369 [2021-07-09 17:31:32,450 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash 341239705, now seen corresponding path program 425 times [2021-07-09 17:31:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:32,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757898454] [2021-07-09 17:31:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:32,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:32,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757898454] [2021-07-09 17:31:32,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757898454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:32,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511139384] [2021-07-09 17:31:32,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:32,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:31:32,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:32,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:32,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:32,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:32,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:33,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:34,192 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:34,193 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:34,772 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 188 [2021-07-09 17:31:36,412 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 277 [2021-07-09 17:31:36,627 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 319 [2021-07-09 17:31:36,995 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 401 [2021-07-09 17:31:37,534 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 444 [2021-07-09 17:31:38,125 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 745 DAG size of output: 444 [2021-07-09 17:31:38,628 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 447 [2021-07-09 17:31:38,913 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 298 [2021-07-09 17:31:39,543 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 197 [2021-07-09 17:31:40,233 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 287 [2021-07-09 17:31:40,420 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 287 [2021-07-09 17:31:40,648 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 290 [2021-07-09 17:31:40,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:40,887 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:31:40,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:40,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:31:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:40,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511139384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:40,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:40,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:31:40,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961820075] [2021-07-09 17:31:40,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:31:40,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:40,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:31:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:31:40,916 INFO L87 Difference]: Start difference. First operand 2661 states and 7837 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:31:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:41,909 INFO L93 Difference]: Finished difference Result 2918 states and 8462 transitions. [2021-07-09 17:31:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:31:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:31:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:41,913 INFO L225 Difference]: With dead ends: 2918 [2021-07-09 17:31:41,913 INFO L226 Difference]: Without dead ends: 2908 [2021-07-09 17:31:41,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:31:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-07-09 17:31:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2687. [2021-07-09 17:31:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.948994787788533) internal successors, (7921), 2686 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7921 transitions. [2021-07-09 17:31:41,948 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7921 transitions. Word has length 22 [2021-07-09 17:31:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:41,948 INFO L482 AbstractCegarLoop]: Abstraction has 2687 states and 7921 transitions. [2021-07-09 17:31:41,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:31:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7921 transitions. [2021-07-09 17:31:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:41,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:41,951 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:42,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37154,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,165 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:42,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:42,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1830644701, now seen corresponding path program 426 times [2021-07-09 17:31:42,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:42,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414929722] [2021-07-09 17:31:42,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:42,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414929722] [2021-07-09 17:31:42,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414929722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189273896] [2021-07-09 17:31:42,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:42,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:31:42,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:31:42,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:42,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:42,739 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:31:42,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:43,697 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 328 [2021-07-09 17:31:44,480 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 358 [2021-07-09 17:31:44,691 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 358 [2021-07-09 17:31:44,884 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 363 [2021-07-09 17:31:45,046 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 362 [2021-07-09 17:31:45,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:31:45,682 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:31:45,682 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:31:45,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:31:47,046 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 272 [2021-07-09 17:31:47,207 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 311 [2021-07-09 17:31:48,166 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 293 [2021-07-09 17:31:48,377 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 348 [2021-07-09 17:31:48,706 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 823 DAG size of output: 494 [2021-07-09 17:31:49,213 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 553 [2021-07-09 17:31:49,721 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 906 DAG size of output: 553 [2021-07-09 17:31:50,303 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 558 [2021-07-09 17:31:50,861 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 635 [2021-07-09 17:31:51,417 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 247 [2021-07-09 17:31:51,531 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 283 [2021-07-09 17:31:51,728 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-07-09 17:31:52,141 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 261 [2021-07-09 17:31:52,605 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 343 [2021-07-09 17:31:52,771 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 343 [2021-07-09 17:31:52,967 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 336 [2021-07-09 17:31:53,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:31:53,247 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:31:53,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:31:53,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:31:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:31:53,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189273896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:53,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:31:53,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:31:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392587285] [2021-07-09 17:31:53,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:31:53,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:31:53,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:31:53,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:31:53,284 INFO L87 Difference]: Start difference. First operand 2687 states and 7921 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:31:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:31:54,491 INFO L93 Difference]: Finished difference Result 3155 states and 9023 transitions. [2021-07-09 17:31:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:31:54,491 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:31:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:31:54,496 INFO L225 Difference]: With dead ends: 3155 [2021-07-09 17:31:54,496 INFO L226 Difference]: Without dead ends: 3121 [2021-07-09 17:31:54,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:31:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-07-09 17:31:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2693. [2021-07-09 17:31:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.947251114413076) internal successors, (7934), 2692 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:31:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7934 transitions. [2021-07-09 17:31:54,537 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7934 transitions. Word has length 22 [2021-07-09 17:31:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:31:54,537 INFO L482 AbstractCegarLoop]: Abstraction has 2693 states and 7934 transitions. [2021-07-09 17:31:54,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:31:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7934 transitions. [2021-07-09 17:31:54,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:31:54,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:31:54,541 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:31:54,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37964 [2021-07-09 17:31:54,749 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:31:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:31:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 757559321, now seen corresponding path program 427 times [2021-07-09 17:31:54,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:31:54,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885188865] [2021-07-09 17:31:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:31:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:31:54,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:31:54,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885188865] [2021-07-09 17:31:54,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885188865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:31:54,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531043666] [2021-07-09 17:31:54,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:31:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:31:54,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:31:54,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:31:55,365 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:31:55,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:31:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:31:56,005 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 300 [2021-07-09 17:31:56,119 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 300 [2021-07-09 17:31:56,251 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 311 [2021-07-09 17:31:56,446 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 404 [2021-07-09 17:31:56,621 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 315 [2021-07-09 17:31:56,740 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 223 [2021-07-09 17:31:58,042 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 224 [2021-07-09 17:31:58,197 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 277 [2021-07-09 17:31:58,482 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 390 [2021-07-09 17:31:58,867 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 458 [2021-07-09 17:31:59,288 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 458 [2021-07-09 17:31:59,709 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 465 [2021-07-09 17:31:59,884 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 353 [2021-07-09 17:32:00,110 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 326 [2021-07-09 17:32:00,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:01,140 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:32:01,140 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:32:01,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:32:02,201 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 209 [2021-07-09 17:32:02,662 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 194 [2021-07-09 17:32:02,845 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 214 [2021-07-09 17:32:03,093 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 313 [2021-07-09 17:32:03,331 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 313 [2021-07-09 17:32:03,657 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 317 [2021-07-09 17:32:04,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:04,340 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:32:04,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:04,340 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:32:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:04,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531043666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:04,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:04,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:32:04,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932812479] [2021-07-09 17:32:04,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:32:04,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:32:04,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:04,368 INFO L87 Difference]: Start difference. First operand 2693 states and 7934 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:32:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:05,106 INFO L93 Difference]: Finished difference Result 2902 states and 8407 transitions. [2021-07-09 17:32:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:32:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:32:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:05,110 INFO L225 Difference]: With dead ends: 2902 [2021-07-09 17:32:05,111 INFO L226 Difference]: Without dead ends: 2887 [2021-07-09 17:32:05,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:32:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-07-09 17:32:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2699. [2021-07-09 17:32:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946256486286138) internal successors, (7949), 2698 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7949 transitions. [2021-07-09 17:32:05,150 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7949 transitions. Word has length 22 [2021-07-09 17:32:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:05,150 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7949 transitions. [2021-07-09 17:32:05,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:32:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7949 transitions. [2021-07-09 17:32:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:05,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:05,153 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:05,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38902 [2021-07-09 17:32:05,369 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1851650909, now seen corresponding path program 428 times [2021-07-09 17:32:05,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:05,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222719553] [2021-07-09 17:32:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:05,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222719553] [2021-07-09 17:32:05,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222719553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:05,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016958168] [2021-07-09 17:32:05,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:05,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:32:05,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:05,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:05,984 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:32:05,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:05,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:06,537 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 219 [2021-07-09 17:32:06,652 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 193 [2021-07-09 17:32:06,809 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 161 [2021-07-09 17:32:07,788 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 268 [2021-07-09 17:32:07,933 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 268 [2021-07-09 17:32:08,151 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 275 [2021-07-09 17:32:08,430 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 314 [2021-07-09 17:32:08,680 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 216 [2021-07-09 17:32:09,428 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 231 [2021-07-09 17:32:09,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:09,804 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:32:09,804 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:32:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:32:10,316 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 237 [2021-07-09 17:32:10,461 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 219 [2021-07-09 17:32:11,782 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 319 [2021-07-09 17:32:12,965 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 334 [2021-07-09 17:32:13,311 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 474 [2021-07-09 17:32:13,770 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 741 DAG size of output: 524 [2021-07-09 17:32:14,368 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 810 DAG size of output: 571 [2021-07-09 17:32:14,992 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 829 DAG size of output: 585 [2021-07-09 17:32:15,759 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 921 DAG size of output: 667 [2021-07-09 17:32:16,653 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 676 [2021-07-09 17:32:17,553 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 676 [2021-07-09 17:32:18,588 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 937 DAG size of output: 682 [2021-07-09 17:32:19,385 WARN L205 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 504 [2021-07-09 17:32:19,888 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 414 [2021-07-09 17:32:20,106 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 249 [2021-07-09 17:32:20,549 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 239 [2021-07-09 17:32:20,709 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 239 [2021-07-09 17:32:20,900 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 243 [2021-07-09 17:32:21,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:21,387 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:32:21,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:21,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:32:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:21,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016958168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:21,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:32:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538913671] [2021-07-09 17:32:21,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:32:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:32:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:21,417 INFO L87 Difference]: Start difference. First operand 2699 states and 7949 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:32:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:22,455 INFO L93 Difference]: Finished difference Result 2977 states and 8602 transitions. [2021-07-09 17:32:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:32:22,455 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:32:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:22,459 INFO L225 Difference]: With dead ends: 2977 [2021-07-09 17:32:22,459 INFO L226 Difference]: Without dead ends: 2962 [2021-07-09 17:32:22,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:32:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-07-09 17:32:22,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2699. [2021-07-09 17:32:22,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-07-09 17:32:22,490 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-07-09 17:32:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:22,490 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-07-09 17:32:22,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:32:22,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-07-09 17:32:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:22,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:22,492 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:22,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39709,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,708 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1408751769, now seen corresponding path program 429 times [2021-07-09 17:32:22,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:22,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352634838] [2021-07-09 17:32:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:22,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352634838] [2021-07-09 17:32:22,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352634838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168716154] [2021-07-09 17:32:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:22,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:32:22,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:22,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:22,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:23,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:23,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:24,017 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 307 [2021-07-09 17:32:24,150 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 307 [2021-07-09 17:32:24,340 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-07-09 17:32:24,757 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 310 [2021-07-09 17:32:25,285 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 275 [2021-07-09 17:32:25,487 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 311 [2021-07-09 17:32:25,650 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 269 [2021-07-09 17:32:25,881 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 248 [2021-07-09 17:32:26,713 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 286 [2021-07-09 17:32:26,819 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 261 [2021-07-09 17:32:27,025 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 241 [2021-07-09 17:32:27,928 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 749 DAG size of output: 410 [2021-07-09 17:32:28,264 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 431 [2021-07-09 17:32:28,645 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 925 DAG size of output: 450 [2021-07-09 17:32:29,120 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 459 [2021-07-09 17:32:29,561 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 459 [2021-07-09 17:32:30,064 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 945 DAG size of output: 466 [2021-07-09 17:32:30,392 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 449 [2021-07-09 17:32:30,703 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 383 [2021-07-09 17:32:31,037 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 302 [2021-07-09 17:32:31,165 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 299 [2021-07-09 17:32:31,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:32,162 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:32:32,162 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:32:32,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:32:33,208 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 271 [2021-07-09 17:32:33,368 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 271 [2021-07-09 17:32:33,509 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 276 [2021-07-09 17:32:34,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:34,325 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:32:34,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:34,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:32:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:34,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168716154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:34,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:34,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:32:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874044428] [2021-07-09 17:32:34,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:32:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:32:34,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:34,358 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:32:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:35,194 INFO L93 Difference]: Finished difference Result 2918 states and 8461 transitions. [2021-07-09 17:32:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:32:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:32:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:35,197 INFO L225 Difference]: With dead ends: 2918 [2021-07-09 17:32:35,198 INFO L226 Difference]: Without dead ends: 2908 [2021-07-09 17:32:35,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=269, Invalid=2083, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:32:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-07-09 17:32:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2699. [2021-07-09 17:32:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9481097108969605) internal successors, (7954), 2698 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7954 transitions. [2021-07-09 17:32:35,230 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7954 transitions. Word has length 22 [2021-07-09 17:32:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:35,230 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7954 transitions. [2021-07-09 17:32:35,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:32:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7954 transitions. [2021-07-09 17:32:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:35,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:35,233 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:35,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40803,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,450 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:35,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash 998887215, now seen corresponding path program 430 times [2021-07-09 17:32:35,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:35,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320996112] [2021-07-09 17:32:35,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:35,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320996112] [2021-07-09 17:32:35,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320996112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688244809] [2021-07-09 17:32:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:35,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:32:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:35,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:35,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:36,082 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:32:36,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:36,718 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 319 [2021-07-09 17:32:36,829 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 319 [2021-07-09 17:32:36,949 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 326 [2021-07-09 17:32:37,086 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 355 [2021-07-09 17:32:37,444 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 331 [2021-07-09 17:32:38,065 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 260 [2021-07-09 17:32:38,193 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 269 [2021-07-09 17:32:38,407 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 286 [2021-07-09 17:32:38,912 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 216 [2021-07-09 17:32:39,500 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 268 [2021-07-09 17:32:39,620 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 268 [2021-07-09 17:32:39,769 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 272 [2021-07-09 17:32:39,902 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 257 [2021-07-09 17:32:40,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:40,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:32:40,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:32:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:40,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688244809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:40,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:40,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:32:40,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522418530] [2021-07-09 17:32:40,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:32:40,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:40,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:32:40,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:32:40,172 INFO L87 Difference]: Start difference. First operand 2699 states and 7954 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 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) [2021-07-09 17:32:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:40,711 INFO L93 Difference]: Finished difference Result 2738 states and 8012 transitions. [2021-07-09 17:32:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:32:40,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 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 22 [2021-07-09 17:32:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:40,714 INFO L225 Difference]: With dead ends: 2738 [2021-07-09 17:32:40,714 INFO L226 Difference]: Without dead ends: 2712 [2021-07-09 17:32:40,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 577.7ms TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:32:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-09 17:32:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2699. [2021-07-09 17:32:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.946997776130467) internal successors, (7951), 2698 states have internal predecessors, (7951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7951 transitions. [2021-07-09 17:32:40,745 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7951 transitions. Word has length 22 [2021-07-09 17:32:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:40,745 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7951 transitions. [2021-07-09 17:32:40,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 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) [2021-07-09 17:32:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7951 transitions. [2021-07-09 17:32:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:40,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:40,748 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:40,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41603,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:40,964 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1502482099, now seen corresponding path program 431 times [2021-07-09 17:32:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:40,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30395279] [2021-07-09 17:32:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:41,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:41,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30395279] [2021-07-09 17:32:41,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30395279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:41,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614949377] [2021-07-09 17:32:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:41,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:32:41,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:41,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:41,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:41,589 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:32:41,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:41,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:42,336 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 260 [2021-07-09 17:32:42,519 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 238 [2021-07-09 17:32:42,651 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 280 [2021-07-09 17:32:43,369 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 216 [2021-07-09 17:32:43,495 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 216 [2021-07-09 17:32:43,630 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 223 [2021-07-09 17:32:43,813 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 212 [2021-07-09 17:32:44,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:44,863 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:32:44,863 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:32:44,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:32:45,591 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 258 [2021-07-09 17:32:45,707 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 289 [2021-07-09 17:32:45,858 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-07-09 17:32:46,556 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 246 [2021-07-09 17:32:46,759 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 275 [2021-07-09 17:32:46,932 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 308 [2021-07-09 17:32:47,103 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 308 [2021-07-09 17:32:47,295 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 299 [2021-07-09 17:32:47,572 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 368 [2021-07-09 17:32:47,849 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 273 [2021-07-09 17:32:48,007 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 199 [2021-07-09 17:32:48,605 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 197 [2021-07-09 17:32:48,834 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 275 [2021-07-09 17:32:49,057 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 275 [2021-07-09 17:32:49,307 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 264 [2021-07-09 17:32:49,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:49,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:32:49,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:49,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:32:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614949377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:49,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:49,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:32:49,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073612401] [2021-07-09 17:32:49,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:32:49,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:49,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:32:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:32:49,648 INFO L87 Difference]: Start difference. First operand 2699 states and 7951 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:32:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:50,651 INFO L93 Difference]: Finished difference Result 3366 states and 9748 transitions. [2021-07-09 17:32:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:32:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:32:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:50,656 INFO L225 Difference]: With dead ends: 3366 [2021-07-09 17:32:50,657 INFO L226 Difference]: Without dead ends: 3356 [2021-07-09 17:32:50,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 959.6ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:32:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-07-09 17:32:50,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2699. [2021-07-09 17:32:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 2.9458858413639732) internal successors, (7948), 2698 states have internal predecessors, (7948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 7948 transitions. [2021-07-09 17:32:50,692 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 7948 transitions. Word has length 22 [2021-07-09 17:32:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:50,692 INFO L482 AbstractCegarLoop]: Abstraction has 2699 states and 7948 transitions. [2021-07-09 17:32:50,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:32:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 7948 transitions. [2021-07-09 17:32:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:50,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:50,695 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:50,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42037 [2021-07-09 17:32:50,937 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash 14616815, now seen corresponding path program 432 times [2021-07-09 17:32:50,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:50,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868922654] [2021-07-09 17:32:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:32:51,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:51,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868922654] [2021-07-09 17:32:51,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868922654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:51,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653097901] [2021-07-09 17:32:51,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:51,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:32:51,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:32:51,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:51,524 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:32:51,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:51,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:53,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:32:53,383 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:32:53,384 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:32:53,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:32:54,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:32:54,564 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:32:54,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:32:54,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:32:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:54,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653097901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:54,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:32:54,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:32:54,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707435981] [2021-07-09 17:32:54,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:32:54,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:32:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:32:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:32:54,592 INFO L87 Difference]: Start difference. First operand 2699 states and 7948 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:32:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:32:55,613 INFO L93 Difference]: Finished difference Result 3100 states and 8894 transitions. [2021-07-09 17:32:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:32:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:32:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:32:55,618 INFO L225 Difference]: With dead ends: 3100 [2021-07-09 17:32:55,618 INFO L226 Difference]: Without dead ends: 3078 [2021-07-09 17:32:55,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 811.1ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:32:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-07-09 17:32:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2707. [2021-07-09 17:32:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 2.9464153732446414) internal successors, (7973), 2706 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:32:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 7973 transitions. [2021-07-09 17:32:55,648 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 7973 transitions. Word has length 22 [2021-07-09 17:32:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:32:55,648 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 7973 transitions. [2021-07-09 17:32:55,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:32:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 7973 transitions. [2021-07-09 17:32:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:32:55,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:32:55,651 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:32:55,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42908 [2021-07-09 17:32:55,868 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:32:55,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:32:55,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1504021811, now seen corresponding path program 433 times [2021-07-09 17:32:55,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:32:55,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853982388] [2021-07-09 17:32:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:32:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:32:55,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:32:55,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853982388] [2021-07-09 17:32:55,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853982388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:32:55,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094734603] [2021-07-09 17:32:55,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:32:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:32:56,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:32:56,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:32:56,465 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:32:56,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:32:56,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:32:57,443 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 387 [2021-07-09 17:32:57,613 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 387 [2021-07-09 17:32:57,812 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 398 [2021-07-09 17:32:58,229 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 535 [2021-07-09 17:32:58,643 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 443 [2021-07-09 17:32:58,948 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 424 [2021-07-09 17:32:59,208 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 434 [2021-07-09 17:32:59,432 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 322 [2021-07-09 17:32:59,632 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 347 [2021-07-09 17:33:00,052 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 331 [2021-07-09 17:33:00,358 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 339 [2021-07-09 17:33:00,832 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 728 DAG size of output: 386 [2021-07-09 17:33:01,212 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 413 [2021-07-09 17:33:01,432 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 319 [2021-07-09 17:33:01,595 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 323 [2021-07-09 17:33:02,088 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 340 [2021-07-09 17:33:02,647 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 396 [2021-07-09 17:33:03,031 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 1172 DAG size of output: 590 [2021-07-09 17:33:03,484 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 1265 DAG size of output: 649 [2021-07-09 17:33:04,079 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 671 [2021-07-09 17:33:04,676 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 1430 DAG size of output: 671 [2021-07-09 17:33:05,314 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 1435 DAG size of output: 676 [2021-07-09 17:33:05,815 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 678 DAG size of output: 587 [2021-07-09 17:33:06,755 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 260 [2021-07-09 17:33:06,907 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 269 [2021-07-09 17:33:07,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:07,363 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:33:07,363 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:33:07,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:33:08,051 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 212 [2021-07-09 17:33:08,880 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 210 [2021-07-09 17:33:09,118 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 262 [2021-07-09 17:33:09,708 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 169 [2021-07-09 17:33:10,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:10,390 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:33:10,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:10,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:33:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:10,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094734603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:10,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:10,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:33:10,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939687493] [2021-07-09 17:33:10,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:33:10,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:10,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:33:10,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:10,418 INFO L87 Difference]: Start difference. First operand 2707 states and 7973 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:33:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:11,738 INFO L93 Difference]: Finished difference Result 3336 states and 9435 transitions. [2021-07-09 17:33:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:33:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:33:11,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:11,743 INFO L225 Difference]: With dead ends: 3336 [2021-07-09 17:33:11,743 INFO L226 Difference]: Without dead ends: 3288 [2021-07-09 17:33:11,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1009.5ms TimeCoverageRelationStatistics Valid=410, Invalid=3250, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:33:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-07-09 17:33:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2710. [2021-07-09 17:33:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.9427833148763383) internal successors, (7972), 2709 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 7972 transitions. [2021-07-09 17:33:11,776 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 7972 transitions. Word has length 22 [2021-07-09 17:33:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:11,776 INFO L482 AbstractCegarLoop]: Abstraction has 2710 states and 7972 transitions. [2021-07-09 17:33:11,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:33:11,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 7972 transitions. [2021-07-09 17:33:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:11,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:11,779 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:11,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43363 [2021-07-09 17:33:11,995 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:11,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 430936431, now seen corresponding path program 434 times [2021-07-09 17:33:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:11,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145866898] [2021-07-09 17:33:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:33:12,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:12,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145866898] [2021-07-09 17:33:12,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145866898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:12,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804208560] [2021-07-09 17:33:12,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:12,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:33:12,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:12,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:12,579 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:33:12,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:12,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:33:13,326 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 190 [2021-07-09 17:33:13,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:14,094 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:33:14,094 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:33:14,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:33:14,762 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 269 [2021-07-09 17:33:15,048 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 298 [2021-07-09 17:33:16,134 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 237 [2021-07-09 17:33:16,258 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 268 [2021-07-09 17:33:16,439 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 329 [2021-07-09 17:33:16,670 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 354 [2021-07-09 17:33:16,918 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 354 [2021-07-09 17:33:17,174 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 355 [2021-07-09 17:33:17,373 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 320 [2021-07-09 17:33:17,510 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 262 [2021-07-09 17:33:18,267 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 234 [2021-07-09 17:33:18,375 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 234 [2021-07-09 17:33:18,535 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 237 [2021-07-09 17:33:18,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:18,910 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:33:18,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:18,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:33:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:18,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804208560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:18,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:18,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:33:18,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333383760] [2021-07-09 17:33:18,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:33:18,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:18,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:33:18,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:33:18,938 INFO L87 Difference]: Start difference. First operand 2710 states and 7972 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:33:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:19,891 INFO L93 Difference]: Finished difference Result 3007 states and 8651 transitions. [2021-07-09 17:33:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:33:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:33:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:19,896 INFO L225 Difference]: With dead ends: 3007 [2021-07-09 17:33:19,896 INFO L226 Difference]: Without dead ends: 2992 [2021-07-09 17:33:19,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 847.0ms TimeCoverageRelationStatistics Valid=299, Invalid=2353, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:33:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-07-09 17:33:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2729. [2021-07-09 17:33:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 2.941348973607038) internal successors, (8024), 2728 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 8024 transitions. [2021-07-09 17:33:19,927 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 8024 transitions. Word has length 22 [2021-07-09 17:33:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:19,927 INFO L482 AbstractCegarLoop]: Abstraction has 2729 states and 8024 transitions. [2021-07-09 17:33:19,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:33:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 8024 transitions. [2021-07-09 17:33:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:19,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:19,930 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:20,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44331,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:20,146 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1525028019, now seen corresponding path program 435 times [2021-07-09 17:33:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386959918] [2021-07-09 17:33:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:20,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:20,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386959918] [2021-07-09 17:33:20,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386959918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:20,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047669560] [2021-07-09 17:33:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:20,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:33:20,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:20,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 17:33:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:20,767 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:33:20,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:20,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:33:21,354 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 259 [2021-07-09 17:33:21,572 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 272 [2021-07-09 17:33:21,707 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 298 [2021-07-09 17:33:21,924 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 233 [2021-07-09 17:33:22,920 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 243 [2021-07-09 17:33:23,100 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 254 [2021-07-09 17:33:23,249 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 210 [2021-07-09 17:33:23,371 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 215 [2021-07-09 17:33:24,329 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 176 [2021-07-09 17:33:24,699 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 312 [2021-07-09 17:33:25,121 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 349 [2021-07-09 17:33:25,247 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 251 [2021-07-09 17:33:25,374 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 292 [2021-07-09 17:33:25,510 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 226 [2021-07-09 17:33:26,013 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 175 [2021-07-09 17:33:26,136 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 246 [2021-07-09 17:33:26,719 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 252 [2021-07-09 17:33:26,907 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 325 [2021-07-09 17:33:27,238 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 436 [2021-07-09 17:33:28,273 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 246 [2021-07-09 17:33:28,543 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 313 [2021-07-09 17:33:28,831 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 329 [2021-07-09 17:33:29,470 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 544 [2021-07-09 17:33:30,262 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 642 [2021-07-09 17:33:31,643 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 1450 DAG size of output: 807 [2021-07-09 17:33:32,999 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1450 DAG size of output: 807 [2021-07-09 17:33:34,499 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 1455 DAG size of output: 812 [2021-07-09 17:33:35,788 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 814 DAG size of output: 899 [2021-07-09 17:33:36,328 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 460 [2021-07-09 17:33:36,892 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 207 [2021-07-09 17:33:37,409 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 256 [2021-07-09 17:33:38,181 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 254 [2021-07-09 17:33:38,333 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 264 [2021-07-09 17:33:38,987 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 238 [2021-07-09 17:33:39,170 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 400 [2021-07-09 17:33:39,495 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 534 [2021-07-09 17:33:39,841 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 990 DAG size of output: 534 [2021-07-09 17:33:40,194 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 994 DAG size of output: 538 [2021-07-09 17:33:40,392 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 377 [2021-07-09 17:33:40,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:41,057 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:33:41,058 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:33:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:33:42,278 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 255 [2021-07-09 17:33:42,430 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 277 [2021-07-09 17:33:42,626 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 307 [2021-07-09 17:33:42,881 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 338 [2021-07-09 17:33:43,121 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 338 [2021-07-09 17:33:43,379 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 342 [2021-07-09 17:33:43,577 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 239 [2021-07-09 17:33:43,746 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 242 [2021-07-09 17:33:44,869 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 211 [2021-07-09 17:33:45,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:45,169 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:33:45,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:45,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:33:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:45,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047669560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:45,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:45,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:33:45,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677304731] [2021-07-09 17:33:45,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:33:45,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:45,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:33:45,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:33:45,199 INFO L87 Difference]: Start difference. First operand 2729 states and 8024 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:33:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:46,097 INFO L93 Difference]: Finished difference Result 3110 states and 8920 transitions. [2021-07-09 17:33:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:33:46,098 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:33:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:46,102 INFO L225 Difference]: With dead ends: 3110 [2021-07-09 17:33:46,102 INFO L226 Difference]: Without dead ends: 3095 [2021-07-09 17:33:46,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 930.3ms TimeCoverageRelationStatistics Valid=307, Invalid=2345, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:33:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-07-09 17:33:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 2732. [2021-07-09 17:33:46,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 2.943610399121201) internal successors, (8039), 2731 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 8039 transitions. [2021-07-09 17:33:46,133 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 8039 transitions. Word has length 22 [2021-07-09 17:33:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:46,133 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 8039 transitions. [2021-07-09 17:33:46,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:33:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 8039 transitions. [2021-07-09 17:33:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:46,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:46,136 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:46,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45017,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,352 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1082128879, now seen corresponding path program 436 times [2021-07-09 17:33:46,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:46,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110153317] [2021-07-09 17:33:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:46,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:46,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110153317] [2021-07-09 17:33:46,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110153317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:46,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239431514] [2021-07-09 17:33:46,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:46,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:33:46,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:46,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:46,959 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:33:46,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:33:47,555 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 285 [2021-07-09 17:33:47,672 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 298 [2021-07-09 17:33:47,791 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 299 [2021-07-09 17:33:47,914 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 299 [2021-07-09 17:33:48,050 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 307 [2021-07-09 17:33:48,205 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 313 [2021-07-09 17:33:49,088 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 236 [2021-07-09 17:33:49,259 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 236 [2021-07-09 17:33:49,423 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 241 [2021-07-09 17:33:49,527 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 230 [2021-07-09 17:33:50,135 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 219 [2021-07-09 17:33:50,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:33:50,614 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:33:50,614 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:33:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:33:51,264 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 256 [2021-07-09 17:33:51,380 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 272 [2021-07-09 17:33:53,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:33:53,375 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:33:53,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:33:53,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:33:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:33:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239431514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:53,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:33:53,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:33:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57656552] [2021-07-09 17:33:53,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:33:53,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:33:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:33:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:33:53,404 INFO L87 Difference]: Start difference. First operand 2732 states and 8039 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:33:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:33:54,318 INFO L93 Difference]: Finished difference Result 3038 states and 8759 transitions. [2021-07-09 17:33:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:33:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:33:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:33:54,322 INFO L225 Difference]: With dead ends: 3038 [2021-07-09 17:33:54,322 INFO L226 Difference]: Without dead ends: 3028 [2021-07-09 17:33:54,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:33:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-07-09 17:33:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2734. [2021-07-09 17:33:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 2.9425539699963412) internal successors, (8042), 2733 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:33:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 8042 transitions. [2021-07-09 17:33:54,354 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 8042 transitions. Word has length 22 [2021-07-09 17:33:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:33:54,354 INFO L482 AbstractCegarLoop]: Abstraction has 2734 states and 8042 transitions. [2021-07-09 17:33:54,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:33:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 8042 transitions. [2021-07-09 17:33:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:33:54,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:33:54,357 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:33:54,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46562,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,573 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:33:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:33:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1328354231, now seen corresponding path program 437 times [2021-07-09 17:33:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:33:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575988980] [2021-07-09 17:33:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:33:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:33:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:33:54,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:33:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575988980] [2021-07-09 17:33:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575988980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:33:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377370523] [2021-07-09 17:33:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:33:54,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:33:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:33:54,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:33:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:33:55,288 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:33:55,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:33:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:33:56,064 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 280 [2021-07-09 17:33:56,379 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 283 [2021-07-09 17:33:56,697 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 224 [2021-07-09 17:33:57,530 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 228 [2021-07-09 17:33:58,220 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 227 [2021-07-09 17:33:58,430 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 273 [2021-07-09 17:33:58,644 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 273 [2021-07-09 17:33:58,900 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 278 [2021-07-09 17:33:59,100 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 359 [2021-07-09 17:33:59,618 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 178 [2021-07-09 17:33:59,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:00,080 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:00,080 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:00,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:00,692 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 252 [2021-07-09 17:34:00,819 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 290 [2021-07-09 17:34:00,971 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 268 [2021-07-09 17:34:01,178 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 226 [2021-07-09 17:34:01,994 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 265 [2021-07-09 17:34:02,121 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 280 [2021-07-09 17:34:02,986 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 406 [2021-07-09 17:34:03,327 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 415 [2021-07-09 17:34:04,490 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 307 [2021-07-09 17:34:04,681 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 310 [2021-07-09 17:34:05,235 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 566 [2021-07-09 17:34:06,194 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 641 [2021-07-09 17:34:07,120 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 878 DAG size of output: 675 [2021-07-09 17:34:08,256 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 960 DAG size of output: 732 [2021-07-09 17:34:09,287 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 960 DAG size of output: 732 [2021-07-09 17:34:10,480 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 967 DAG size of output: 721 [2021-07-09 17:34:11,489 WARN L205 SmtUtils]: Spent 954.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 721 [2021-07-09 17:34:12,281 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 692 [2021-07-09 17:34:13,184 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 214 [2021-07-09 17:34:13,351 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 224 [2021-07-09 17:34:13,560 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 244 [2021-07-09 17:34:13,998 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 226 [2021-07-09 17:34:14,521 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 196 [2021-07-09 17:34:14,676 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 220 [2021-07-09 17:34:14,960 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 321 [2021-07-09 17:34:15,328 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 870 DAG size of output: 377 [2021-07-09 17:34:15,656 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 870 DAG size of output: 377 [2021-07-09 17:34:15,869 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 283 [2021-07-09 17:34:16,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:16,328 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:16,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:16,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:34:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:16,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377370523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:16,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:16,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:34:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299811530] [2021-07-09 17:34:16,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:34:16,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:34:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:34:16,357 INFO L87 Difference]: Start difference. First operand 2734 states and 8042 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:34:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:17,717 INFO L93 Difference]: Finished difference Result 3510 states and 9948 transitions. [2021-07-09 17:34:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:34:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:34:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:17,722 INFO L225 Difference]: With dead ends: 3510 [2021-07-09 17:34:17,722 INFO L226 Difference]: Without dead ends: 3469 [2021-07-09 17:34:17,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1165.9ms TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:34:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-07-09 17:34:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2730. [2021-07-09 17:34:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2729 states have (on average 2.9399047270062293) internal successors, (8023), 2729 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 8023 transitions. [2021-07-09 17:34:17,756 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 8023 transitions. Word has length 22 [2021-07-09 17:34:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:17,757 INFO L482 AbstractCegarLoop]: Abstraction has 2730 states and 8023 transitions. [2021-07-09 17:34:17,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:34:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 8023 transitions. [2021-07-09 17:34:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:17,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:17,759 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:17,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47222,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:17,975 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:17,976 INFO L82 PathProgramCache]: Analyzing trace with hash -234262643, now seen corresponding path program 438 times [2021-07-09 17:34:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:17,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335090692] [2021-07-09 17:34:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:18,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:18,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335090692] [2021-07-09 17:34:18,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335090692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:18,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32873308] [2021-07-09 17:34:18,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:18,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:34:18,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:18,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:18,605 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:34:18,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:19,360 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 238 [2021-07-09 17:34:19,482 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 249 [2021-07-09 17:34:19,687 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 311 [2021-07-09 17:34:19,973 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 300 [2021-07-09 17:34:20,105 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 194 [2021-07-09 17:34:20,950 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 278 [2021-07-09 17:34:21,588 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 219 [2021-07-09 17:34:21,702 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 228 [2021-07-09 17:34:21,933 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 321 [2021-07-09 17:34:22,272 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 428 [2021-07-09 17:34:22,619 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 428 [2021-07-09 17:34:22,988 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 433 [2021-07-09 17:34:23,213 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 297 [2021-07-09 17:34:23,430 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 294 [2021-07-09 17:34:24,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:24,877 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:24,877 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:24,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:25,606 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 267 [2021-07-09 17:34:25,718 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 270 [2021-07-09 17:34:26,540 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 260 [2021-07-09 17:34:26,694 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 300 [2021-07-09 17:34:26,918 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 313 [2021-07-09 17:34:27,107 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 313 [2021-07-09 17:34:27,327 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 319 [2021-07-09 17:34:27,504 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 262 [2021-07-09 17:34:27,663 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 237 [2021-07-09 17:34:28,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:28,133 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:28,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:28,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:34:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32873308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:28,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:28,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:34:28,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493219751] [2021-07-09 17:34:28,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:34:28,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:34:28,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:34:28,162 INFO L87 Difference]: Start difference. First operand 2730 states and 8023 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:34:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:29,423 INFO L93 Difference]: Finished difference Result 3643 states and 10471 transitions. [2021-07-09 17:34:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:34:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:34:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:29,428 INFO L225 Difference]: With dead ends: 3643 [2021-07-09 17:34:29,428 INFO L226 Difference]: Without dead ends: 3610 [2021-07-09 17:34:29,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1127.4ms TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:34:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-07-09 17:34:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2622. [2021-07-09 17:34:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2621 states have (on average 2.9355207935902325) internal successors, (7694), 2621 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 7694 transitions. [2021-07-09 17:34:29,461 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 7694 transitions. Word has length 22 [2021-07-09 17:34:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:29,461 INFO L482 AbstractCegarLoop]: Abstraction has 2622 states and 7694 transitions. [2021-07-09 17:34:29,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:34:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 7694 transitions. [2021-07-09 17:34:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:29,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:29,464 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:29,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48430 [2021-07-09 17:34:29,680 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash -677161783, now seen corresponding path program 439 times [2021-07-09 17:34:29,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:29,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012744131] [2021-07-09 17:34:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:29,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:29,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012744131] [2021-07-09 17:34:29,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012744131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:29,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991113135] [2021-07-09 17:34:29,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:29,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:30,351 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:34:30,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:30,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:31,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:31,321 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:31,322 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:31,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:32,350 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 185 [2021-07-09 17:34:32,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:32,763 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:32,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:32,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:34:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:32,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991113135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:32,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:32,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:34:32,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494606945] [2021-07-09 17:34:32,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:34:32,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:32,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:34:32,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:34:32,792 INFO L87 Difference]: Start difference. First operand 2622 states and 7694 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:34:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:33,741 INFO L93 Difference]: Finished difference Result 3243 states and 9300 transitions. [2021-07-09 17:34:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:34:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:34:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:33,745 INFO L225 Difference]: With dead ends: 3243 [2021-07-09 17:34:33,745 INFO L226 Difference]: Without dead ends: 3233 [2021-07-09 17:34:33,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 946.3ms TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:34:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-07-09 17:34:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2624. [2021-07-09 17:34:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.9363324437666796) internal successors, (7702), 2623 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7702 transitions. [2021-07-09 17:34:33,777 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7702 transitions. Word has length 22 [2021-07-09 17:34:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:33,777 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 7702 transitions. [2021-07-09 17:34:33,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:34:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7702 transitions. [2021-07-09 17:34:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:33,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:33,779 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:33,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49313,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:33,996 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1067202223, now seen corresponding path program 440 times [2021-07-09 17:34:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:33,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641998701] [2021-07-09 17:34:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:34,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:34,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641998701] [2021-07-09 17:34:34,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641998701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:34,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162975885] [2021-07-09 17:34:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:34,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:34:34,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:34,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:34,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:34,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:34,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:35,083 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 198 [2021-07-09 17:34:36,198 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 251 [2021-07-09 17:34:36,395 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 304 [2021-07-09 17:34:36,615 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 304 [2021-07-09 17:34:36,835 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 309 [2021-07-09 17:34:36,970 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 243 [2021-07-09 17:34:37,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:37,744 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:37,744 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:37,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:38,476 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 275 [2021-07-09 17:34:39,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:39,507 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:39,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:39,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:34:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162975885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:39,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:39,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:34:39,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543640827] [2021-07-09 17:34:39,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:34:39,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:39,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:34:39,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:34:39,536 INFO L87 Difference]: Start difference. First operand 2624 states and 7702 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:34:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:40,647 INFO L93 Difference]: Finished difference Result 3200 states and 9255 transitions. [2021-07-09 17:34:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:34:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:34:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:40,651 INFO L225 Difference]: With dead ends: 3200 [2021-07-09 17:34:40,651 INFO L226 Difference]: Without dead ends: 3190 [2021-07-09 17:34:40,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1060.9ms TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:34:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-07-09 17:34:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2692. [2021-07-09 17:34:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.938684503901895) internal successors, (7908), 2691 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7908 transitions. [2021-07-09 17:34:40,696 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7908 transitions. Word has length 22 [2021-07-09 17:34:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:40,696 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 7908 transitions. [2021-07-09 17:34:40,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:34:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7908 transitions. [2021-07-09 17:34:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:40,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:40,699 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:40,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49659 [2021-07-09 17:34:40,900 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:40,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:40,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1088702763, now seen corresponding path program 441 times [2021-07-09 17:34:40,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:40,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888613661] [2021-07-09 17:34:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:41,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:41,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888613661] [2021-07-09 17:34:41,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888613661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:41,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135874028] [2021-07-09 17:34:41,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:41,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:34:41,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:41,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:41,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:41,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:42,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:42,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:34:42,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:34:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:42,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135874028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:42,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:42,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:34:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795716570] [2021-07-09 17:34:42,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:34:42,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:42,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:34:42,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:42,303 INFO L87 Difference]: Start difference. First operand 2692 states and 7908 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:34:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:42,787 INFO L93 Difference]: Finished difference Result 2915 states and 8552 transitions. [2021-07-09 17:34:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:34:42,787 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:34:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:42,791 INFO L225 Difference]: With dead ends: 2915 [2021-07-09 17:34:42,791 INFO L226 Difference]: Without dead ends: 2897 [2021-07-09 17:34:42,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:34:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-07-09 17:34:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2847. [2021-07-09 17:34:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.95572733661279) internal successors, (8412), 2846 states have internal predecessors, (8412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8412 transitions. [2021-07-09 17:34:42,821 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8412 transitions. Word has length 22 [2021-07-09 17:34:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:42,821 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 8412 transitions. [2021-07-09 17:34:42,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:34:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8412 transitions. [2021-07-09 17:34:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:42,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:42,824 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:43,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50327,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,042 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:43,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1947577293, now seen corresponding path program 442 times [2021-07-09 17:34:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029680268] [2021-07-09 17:34:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:34:43,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029680268] [2021-07-09 17:34:43,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029680268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:43,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075875393] [2021-07-09 17:34:43,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:43,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:34:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:43,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:43,617 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:34:43,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:43,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:44,235 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 334 [2021-07-09 17:34:44,377 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 350 [2021-07-09 17:34:44,521 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 350 [2021-07-09 17:34:44,693 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 357 [2021-07-09 17:34:44,925 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 386 [2021-07-09 17:34:45,049 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 331 [2021-07-09 17:34:45,657 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 236 [2021-07-09 17:34:46,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:46,384 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:46,384 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:46,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:47,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:47,327 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:47,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:47,327 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:34:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:47,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075875393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:47,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:47,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-07-09 17:34:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593197350] [2021-07-09 17:34:47,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:34:47,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:34:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:34:47,356 INFO L87 Difference]: Start difference. First operand 2847 states and 8412 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:34:48,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:48,880 INFO L93 Difference]: Finished difference Result 3268 states and 9465 transitions. [2021-07-09 17:34:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:34:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 22 [2021-07-09 17:34:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:48,886 INFO L225 Difference]: With dead ends: 3268 [2021-07-09 17:34:48,886 INFO L226 Difference]: Without dead ends: 3228 [2021-07-09 17:34:48,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1003.5ms TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:34:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-07-09 17:34:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2862. [2021-07-09 17:34:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.9598042642432714) internal successors, (8468), 2861 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 8468 transitions. [2021-07-09 17:34:48,920 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 8468 transitions. Word has length 22 [2021-07-09 17:34:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:48,920 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 8468 transitions. [2021-07-09 17:34:48,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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) [2021-07-09 17:34:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 8468 transitions. [2021-07-09 17:34:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:48,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:48,923 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:49,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50482 [2021-07-09 17:34:49,139 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:49,139 INFO L82 PathProgramCache]: Analyzing trace with hash -636776695, now seen corresponding path program 443 times [2021-07-09 17:34:49,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:49,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049211661] [2021-07-09 17:34:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:49,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049211661] [2021-07-09 17:34:49,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049211661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400867360] [2021-07-09 17:34:49,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:49,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:34:49,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:49,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:49,773 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:34:49,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:51,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:51,370 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:51,371 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:51,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:52,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:34:52,385 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:34:52,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:34:52,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:34:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:34:52,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400867360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:52,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:34:52,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:34:52,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539670428] [2021-07-09 17:34:52,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:34:52,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:34:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:34:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:34:52,414 INFO L87 Difference]: Start difference. First operand 2862 states and 8468 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:34:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:34:54,175 INFO L93 Difference]: Finished difference Result 3624 states and 10394 transitions. [2021-07-09 17:34:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 17:34:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:34:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:34:54,180 INFO L225 Difference]: With dead ends: 3624 [2021-07-09 17:34:54,180 INFO L226 Difference]: Without dead ends: 3563 [2021-07-09 17:34:54,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1272.0ms TimeCoverageRelationStatistics Valid=541, Invalid=4289, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:34:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-09 17:34:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2882. [2021-07-09 17:34:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.9597362027073935) internal successors, (8527), 2881 states have internal predecessors, (8527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:34:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 8527 transitions. [2021-07-09 17:34:54,215 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 8527 transitions. Word has length 22 [2021-07-09 17:34:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:34:54,215 INFO L482 AbstractCegarLoop]: Abstraction has 2882 states and 8527 transitions. [2021-07-09 17:34:54,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:34:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 8527 transitions. [2021-07-09 17:34:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:34:54,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:34:54,218 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:34:54,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50919,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:54,434 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:34:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:34:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 852628301, now seen corresponding path program 444 times [2021-07-09 17:34:54,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:34:54,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142621115] [2021-07-09 17:34:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:34:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:34:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:34:54,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:34:54,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142621115] [2021-07-09 17:34:54,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142621115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:34:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939137044] [2021-07-09 17:34:54,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:34:54,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:34:54,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:34:54,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:34:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:34:55,009 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:34:55,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:34:55,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:34:56,273 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 237 [2021-07-09 17:34:56,435 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 237 [2021-07-09 17:34:56,620 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 244 [2021-07-09 17:34:56,742 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 225 [2021-07-09 17:34:57,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:34:57,917 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:34:57,918 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:34:57,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:34:58,502 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 241 [2021-07-09 17:34:58,704 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 239 [2021-07-09 17:34:58,901 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 309 [2021-07-09 17:34:59,057 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 285 [2021-07-09 17:34:59,182 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 228 [2021-07-09 17:35:00,435 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 322 [2021-07-09 17:35:00,657 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 368 [2021-07-09 17:35:01,211 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 477 [2021-07-09 17:35:01,645 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 524 [2021-07-09 17:35:02,187 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 524 [2021-07-09 17:35:02,819 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 501 [2021-07-09 17:35:03,156 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 341 [2021-07-09 17:35:03,276 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 239 [2021-07-09 17:35:04,333 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 243 [2021-07-09 17:35:04,565 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 319 [2021-07-09 17:35:04,919 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 332 [2021-07-09 17:35:05,179 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 332 [2021-07-09 17:35:05,457 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 332 [2021-07-09 17:35:05,800 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 256 [2021-07-09 17:35:06,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:06,078 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:35:06,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:06,079 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:35:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:06,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939137044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:06,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:06,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:35:06,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570843862] [2021-07-09 17:35:06,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:35:06,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:06,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:35:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:35:06,110 INFO L87 Difference]: Start difference. First operand 2882 states and 8527 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:35:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:07,441 INFO L93 Difference]: Finished difference Result 3383 states and 9835 transitions. [2021-07-09 17:35:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:35:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:35:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:07,448 INFO L225 Difference]: With dead ends: 3383 [2021-07-09 17:35:07,448 INFO L226 Difference]: Without dead ends: 3368 [2021-07-09 17:35:07,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 939.0ms TimeCoverageRelationStatistics Valid=305, Invalid=2665, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:35:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-07-09 17:35:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2956. [2021-07-09 17:35:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.964128595600677) internal successors, (8759), 2955 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 8759 transitions. [2021-07-09 17:35:07,489 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 8759 transitions. Word has length 22 [2021-07-09 17:35:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:07,489 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 8759 transitions. [2021-07-09 17:35:07,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:35:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 8759 transitions. [2021-07-09 17:35:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:07,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:07,492 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:07,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51302 [2021-07-09 17:35:07,708 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash -220457079, now seen corresponding path program 445 times [2021-07-09 17:35:07,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:07,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273417567] [2021-07-09 17:35:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:07,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:07,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273417567] [2021-07-09 17:35:07,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273417567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:07,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621270583] [2021-07-09 17:35:07,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:07,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:07,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:08,442 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:35:08,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:08,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:35:09,051 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 338 [2021-07-09 17:35:09,165 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 338 [2021-07-09 17:35:09,313 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 349 [2021-07-09 17:35:09,513 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 348 [2021-07-09 17:35:09,690 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 317 [2021-07-09 17:35:09,932 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 247 [2021-07-09 17:35:10,982 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 274 [2021-07-09 17:35:11,177 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 365 [2021-07-09 17:35:11,407 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 384 [2021-07-09 17:35:11,673 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 384 [2021-07-09 17:35:11,920 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 540 DAG size of output: 389 [2021-07-09 17:35:12,103 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 317 [2021-07-09 17:35:12,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:12,824 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:35:12,825 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:35:12,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:35:14,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:14,030 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:35:14,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:14,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:35:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:14,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621270583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:14,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:14,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:35:14,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323769680] [2021-07-09 17:35:14,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:35:14,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:14,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:35:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:35:14,059 INFO L87 Difference]: Start difference. First operand 2956 states and 8759 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:35:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:15,553 INFO L93 Difference]: Finished difference Result 3629 states and 10445 transitions. [2021-07-09 17:35:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:35:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:35:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:15,559 INFO L225 Difference]: With dead ends: 3629 [2021-07-09 17:35:15,560 INFO L226 Difference]: Without dead ends: 3597 [2021-07-09 17:35:15,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1291.9ms TimeCoverageRelationStatistics Valid=456, Invalid=3834, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 17:35:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-07-09 17:35:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2955. [2021-07-09 17:35:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 2.9617467840216656) internal successors, (8749), 2954 states have internal predecessors, (8749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 8749 transitions. [2021-07-09 17:35:15,601 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 8749 transitions. Word has length 22 [2021-07-09 17:35:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:15,601 INFO L482 AbstractCegarLoop]: Abstraction has 2955 states and 8749 transitions. [2021-07-09 17:35:15,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:35:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 8749 transitions. [2021-07-09 17:35:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:15,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:15,604 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:15,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52248,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:15,824 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash 873634509, now seen corresponding path program 446 times [2021-07-09 17:35:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:15,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184173287] [2021-07-09 17:35:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:35:15,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:15,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184173287] [2021-07-09 17:35:15,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184173287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:15,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183315018] [2021-07-09 17:35:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:15,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:35:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:15,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:16,463 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:35:16,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:35:17,152 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 220 [2021-07-09 17:35:17,332 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 254 [2021-07-09 17:35:17,766 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 247 [2021-07-09 17:35:17,871 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 247 [2021-07-09 17:35:17,993 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 252 [2021-07-09 17:35:18,135 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 233 [2021-07-09 17:35:18,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:19,111 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:35:19,111 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:35:19,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:35:19,820 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 334 [2021-07-09 17:35:20,613 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 739 DAG size of output: 536 [2021-07-09 17:35:20,901 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 739 DAG size of output: 536 [2021-07-09 17:35:21,218 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 746 DAG size of output: 537 [2021-07-09 17:35:21,568 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 604 [2021-07-09 17:35:21,995 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 580 [2021-07-09 17:35:22,202 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 245 [2021-07-09 17:35:22,683 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 235 [2021-07-09 17:35:22,973 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 511 [2021-07-09 17:35:23,282 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 467 [2021-07-09 17:35:23,636 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 264 [2021-07-09 17:35:23,938 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 336 [2021-07-09 17:35:24,045 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 295 [2021-07-09 17:35:24,329 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 191 [2021-07-09 17:35:24,628 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 398 [2021-07-09 17:35:25,090 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 466 [2021-07-09 17:35:26,105 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 532 [2021-07-09 17:35:26,742 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 532 [2021-07-09 17:35:27,318 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 499 [2021-07-09 17:35:28,173 WARN L205 SmtUtils]: Spent 852.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 618 [2021-07-09 17:35:28,877 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 553 [2021-07-09 17:35:29,562 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 234 [2021-07-09 17:35:30,075 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 329 [2021-07-09 17:35:30,551 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 382 [2021-07-09 17:35:30,730 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 308 [2021-07-09 17:35:31,351 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 341 [2021-07-09 17:35:31,686 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 711 DAG size of output: 484 [2021-07-09 17:35:32,255 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 502 [2021-07-09 17:35:32,844 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 502 [2021-07-09 17:35:33,546 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 922 DAG size of output: 507 [2021-07-09 17:35:33,835 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 300 [2021-07-09 17:35:34,030 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 293 [2021-07-09 17:35:34,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:34,298 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:35:34,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:34,298 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:35:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:34,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183315018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:34,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:34,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:35:34,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614863212] [2021-07-09 17:35:34,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:35:34,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:35:34,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:35:34,328 INFO L87 Difference]: Start difference. First operand 2955 states and 8749 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:35:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:35,330 INFO L93 Difference]: Finished difference Result 3260 states and 9483 transitions. [2021-07-09 17:35:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:35:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:35:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:35,336 INFO L225 Difference]: With dead ends: 3260 [2021-07-09 17:35:35,336 INFO L226 Difference]: Without dead ends: 3245 [2021-07-09 17:35:35,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1024.6ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:35:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-07-09 17:35:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2963. [2021-07-09 17:35:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 2962 states have (on average 2.960837272113437) internal successors, (8770), 2962 states have internal predecessors, (8770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 8770 transitions. [2021-07-09 17:35:35,383 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 8770 transitions. Word has length 22 [2021-07-09 17:35:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:35,383 INFO L482 AbstractCegarLoop]: Abstraction has 2963 states and 8770 transitions. [2021-07-09 17:35:35,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:35:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 8770 transitions. [2021-07-09 17:35:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:35,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:35,387 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:35,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52803 [2021-07-09 17:35:35,610 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash 430735369, now seen corresponding path program 447 times [2021-07-09 17:35:35,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:35,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038436467] [2021-07-09 17:35:35,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:35,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:35,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038436467] [2021-07-09 17:35:35,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038436467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:35,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271075556] [2021-07-09 17:35:35,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:35,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:35:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:35,843 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:36,348 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:35:36,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:35:37,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:37,472 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:35:37,472 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:35:37,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:35:38,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:38,141 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:35:38,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:38,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:35:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271075556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:38,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:38,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:35:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267650224] [2021-07-09 17:35:38,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:35:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:35:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:38,178 INFO L87 Difference]: Start difference. First operand 2963 states and 8770 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:35:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:39,337 INFO L93 Difference]: Finished difference Result 3373 states and 9785 transitions. [2021-07-09 17:35:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:35:39,338 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:35:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:39,342 INFO L225 Difference]: With dead ends: 3373 [2021-07-09 17:35:39,342 INFO L226 Difference]: Without dead ends: 3358 [2021-07-09 17:35:39,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1147.8ms TimeCoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:35:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-07-09 17:35:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 2965. [2021-07-09 17:35:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-07-09 17:35:39,379 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-07-09 17:35:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:39,379 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-07-09 17:35:39,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:35:39,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-07-09 17:35:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:39,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:39,382 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:39,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53685 [2021-07-09 17:35:39,598 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -414236083, now seen corresponding path program 448 times [2021-07-09 17:35:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:39,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983336922] [2021-07-09 17:35:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:39,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:39,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983336922] [2021-07-09 17:35:39,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983336922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:39,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697862352] [2021-07-09 17:35:39,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:39,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:35:39,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:39,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:40,281 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:35:40,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:40,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:35:40,893 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 272 [2021-07-09 17:35:42,062 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 269 [2021-07-09 17:35:42,190 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 257 [2021-07-09 17:35:43,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:43,308 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:35:43,308 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:35:43,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:35:43,887 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 197 [2021-07-09 17:35:44,950 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 254 [2021-07-09 17:35:45,167 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 265 [2021-07-09 17:35:45,486 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 293 [2021-07-09 17:35:45,841 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 312 [2021-07-09 17:35:46,247 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 365 [2021-07-09 17:35:46,607 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 365 [2021-07-09 17:35:47,036 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 369 [2021-07-09 17:35:47,194 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 238 [2021-07-09 17:35:47,369 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 270 [2021-07-09 17:35:48,175 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 199 [2021-07-09 17:35:48,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:48,544 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:35:48,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:48,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:35:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:48,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697862352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:48,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:48,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:35:48,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309256724] [2021-07-09 17:35:48,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:35:48,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:35:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:48,574 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:35:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:49,563 INFO L93 Difference]: Finished difference Result 3250 states and 9460 transitions. [2021-07-09 17:35:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:35:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:35:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:49,569 INFO L225 Difference]: With dead ends: 3250 [2021-07-09 17:35:49,569 INFO L226 Difference]: Without dead ends: 3240 [2021-07-09 17:35:49,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1050.8ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:35:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-07-09 17:35:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 2965. [2021-07-09 17:35:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9625506072874495) internal successors, (8781), 2964 states have internal predecessors, (8781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8781 transitions. [2021-07-09 17:35:49,606 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8781 transitions. Word has length 22 [2021-07-09 17:35:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:49,606 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 8781 transitions. [2021-07-09 17:35:49,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:35:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8781 transitions. [2021-07-09 17:35:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:49,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:49,609 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:49,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53954 [2021-07-09 17:35:49,825 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:49,826 INFO L82 PathProgramCache]: Analyzing trace with hash -536487783, now seen corresponding path program 449 times [2021-07-09 17:35:49,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:49,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056683343] [2021-07-09 17:35:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:49,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056683343] [2021-07-09 17:35:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056683343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288336241] [2021-07-09 17:35:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:49,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:35:49,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:49,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:50,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:50,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:35:51,166 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 260 [2021-07-09 17:35:51,330 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 274 [2021-07-09 17:35:51,493 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 274 [2021-07-09 17:35:51,646 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 281 [2021-07-09 17:35:51,815 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 360 [2021-07-09 17:35:51,929 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 271 [2021-07-09 17:35:52,103 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 272 [2021-07-09 17:35:52,695 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 283 [2021-07-09 17:35:53,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:53,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:35:53,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-09 17:35:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:53,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288336241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:53,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:53,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:35:53,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234540736] [2021-07-09 17:35:53,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:35:53,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:35:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:35:53,234 INFO L87 Difference]: Start difference. First operand 2965 states and 8781 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:35:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:53,874 INFO L93 Difference]: Finished difference Result 3016 states and 8861 transitions. [2021-07-09 17:35:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:35:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:35:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:53,878 INFO L225 Difference]: With dead ends: 3016 [2021-07-09 17:35:53,878 INFO L226 Difference]: Without dead ends: 2990 [2021-07-09 17:35:53,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:35:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2021-07-09 17:35:53,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2965. [2021-07-09 17:35:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 2.9612010796221324) internal successors, (8777), 2964 states have internal predecessors, (8777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 8777 transitions. [2021-07-09 17:35:53,909 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 8777 transitions. Word has length 22 [2021-07-09 17:35:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:53,909 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 8777 transitions. [2021-07-09 17:35:53,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:35:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 8777 transitions. [2021-07-09 17:35:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:53,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:53,912 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:54,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54657 [2021-07-09 17:35:54,125 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash -468172775, now seen corresponding path program 450 times [2021-07-09 17:35:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:54,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956253290] [2021-07-09 17:35:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:54,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:54,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956253290] [2021-07-09 17:35:54,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956253290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:54,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931553563] [2021-07-09 17:35:54,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:54,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:35:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:35:54,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:35:54,758 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:35:54,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:35:54,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:35:55,840 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 204 [2021-07-09 17:35:56,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:35:56,848 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:35:56,849 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:35:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:35:58,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:35:58,045 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:35:58,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:35:58,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:35:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:35:58,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931553563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:58,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:35:58,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:35:58,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409920206] [2021-07-09 17:35:58,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:35:58,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:35:58,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:35:58,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:35:58,074 INFO L87 Difference]: Start difference. First operand 2965 states and 8777 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:35:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:35:59,145 INFO L93 Difference]: Finished difference Result 3832 states and 11188 transitions. [2021-07-09 17:35:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:35:59,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:35:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:35:59,151 INFO L225 Difference]: With dead ends: 3832 [2021-07-09 17:35:59,151 INFO L226 Difference]: Without dead ends: 3822 [2021-07-09 17:35:59,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1084.5ms TimeCoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:35:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-07-09 17:35:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2972. [2021-07-09 17:35:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 2.9619656681252104) internal successors, (8800), 2971 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:35:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 8800 transitions. [2021-07-09 17:35:59,195 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 8800 transitions. Word has length 22 [2021-07-09 17:35:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:35:59,195 INFO L482 AbstractCegarLoop]: Abstraction has 2972 states and 8800 transitions. [2021-07-09 17:35:59,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:35:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 8800 transitions. [2021-07-09 17:35:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:35:59,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:35:59,198 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:35:59,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54976 [2021-07-09 17:35:59,413 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:35:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:35:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash -682746697, now seen corresponding path program 451 times [2021-07-09 17:35:59,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:35:59,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419332517] [2021-07-09 17:35:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:35:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:35:59,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:35:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419332517] [2021-07-09 17:35:59,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419332517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:35:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354386196] [2021-07-09 17:35:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:35:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:35:59,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:35:59,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:00,006 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:36:00,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:00,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:36:01,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:01,484 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:36:01,484 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:36:01,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:36:02,056 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 247 [2021-07-09 17:36:02,163 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 247 [2021-07-09 17:36:02,303 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 255 [2021-07-09 17:36:02,467 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 275 [2021-07-09 17:36:02,607 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 270 [2021-07-09 17:36:02,794 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 297 [2021-07-09 17:36:03,640 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 267 [2021-07-09 17:36:04,588 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 241 [2021-07-09 17:36:04,875 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 352 [2021-07-09 17:36:05,210 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-07-09 17:36:05,585 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 395 [2021-07-09 17:36:05,998 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 395 [2021-07-09 17:36:06,428 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 397 [2021-07-09 17:36:06,825 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 342 [2021-07-09 17:36:07,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:07,513 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:36:07,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:07,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:36:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:07,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354386196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:07,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:07,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 17:36:07,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178933744] [2021-07-09 17:36:07,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:36:07,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:36:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:36:07,543 INFO L87 Difference]: Start difference. First operand 2972 states and 8800 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:36:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:09,036 INFO L93 Difference]: Finished difference Result 3762 states and 10747 transitions. [2021-07-09 17:36:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 17:36:09,036 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 22 [2021-07-09 17:36:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:09,042 INFO L225 Difference]: With dead ends: 3762 [2021-07-09 17:36:09,042 INFO L226 Difference]: Without dead ends: 3707 [2021-07-09 17:36:09,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1160.0ms TimeCoverageRelationStatistics Valid=499, Invalid=4057, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:36:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2021-07-09 17:36:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 2980. [2021-07-09 17:36:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 2.959718026183283) internal successors, (8817), 2979 states have internal predecessors, (8817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 8817 transitions. [2021-07-09 17:36:09,087 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 8817 transitions. Word has length 22 [2021-07-09 17:36:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:09,087 INFO L482 AbstractCegarLoop]: Abstraction has 2980 states and 8817 transitions. [2021-07-09 17:36:09,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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) [2021-07-09 17:36:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 8817 transitions. [2021-07-09 17:36:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:36:09,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:09,090 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:09,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55371,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,306 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1755832077, now seen corresponding path program 452 times [2021-07-09 17:36:09,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:09,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576904876] [2021-07-09 17:36:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:09,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:09,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576904876] [2021-07-09 17:36:09,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576904876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:09,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771073908] [2021-07-09 17:36:09,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:09,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:36:09,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:09,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:09,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:09,904 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:36:09,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:09,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:36:10,944 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 272 [2021-07-09 17:36:11,064 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 287 [2021-07-09 17:36:11,187 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 287 [2021-07-09 17:36:11,360 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 292 [2021-07-09 17:36:11,480 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 215 [2021-07-09 17:36:11,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:12,049 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:36:12,049 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:36:12,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:36:12,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:12,704 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:36:12,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:12,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:36:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:12,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771073908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:12,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:12,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:36:12,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731404090] [2021-07-09 17:36:12,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:36:12,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:12,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:36:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:36:12,732 INFO L87 Difference]: Start difference. First operand 2980 states and 8817 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:36:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:14,276 INFO L93 Difference]: Finished difference Result 3987 states and 11396 transitions. [2021-07-09 17:36:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 17:36:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:36:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:14,283 INFO L225 Difference]: With dead ends: 3987 [2021-07-09 17:36:14,283 INFO L226 Difference]: Without dead ends: 3932 [2021-07-09 17:36:14,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1241.0ms TimeCoverageRelationStatistics Valid=575, Invalid=4681, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:36:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2021-07-09 17:36:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 2986. [2021-07-09 17:36:14,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.9591289782244554) internal successors, (8833), 2985 states have internal predecessors, (8833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 8833 transitions. [2021-07-09 17:36:14,326 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 8833 transitions. Word has length 22 [2021-07-09 17:36:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:14,327 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 8833 transitions. [2021-07-09 17:36:14,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:36:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 8833 transitions. [2021-07-09 17:36:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:36:14,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:14,330 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:14,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56024 [2021-07-09 17:36:14,546 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash -661740489, now seen corresponding path program 453 times [2021-07-09 17:36:14,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:14,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052925990] [2021-07-09 17:36:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:36:14,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:14,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052925990] [2021-07-09 17:36:14,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052925990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:14,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957231802] [2021-07-09 17:36:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:14,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:36:14,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:14,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:15,149 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:36:15,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:36:16,499 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 300 [2021-07-09 17:36:16,672 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 300 [2021-07-09 17:36:16,862 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 307 [2021-07-09 17:36:17,122 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 367 [2021-07-09 17:36:17,317 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 317 [2021-07-09 17:36:17,822 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 152 [2021-07-09 17:36:17,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:18,184 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:36:18,185 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:36:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:36:18,800 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 220 [2021-07-09 17:36:18,984 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 264 [2021-07-09 17:36:19,797 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 273 [2021-07-09 17:36:20,782 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 294 [2021-07-09 17:36:21,154 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 461 [2021-07-09 17:36:21,733 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 533 [2021-07-09 17:36:22,354 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 533 [2021-07-09 17:36:23,190 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 645 DAG size of output: 540 [2021-07-09 17:36:23,644 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 220 [2021-07-09 17:36:24,462 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 284 [2021-07-09 17:36:24,646 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 363 [2021-07-09 17:36:24,832 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 363 [2021-07-09 17:36:25,063 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 350 [2021-07-09 17:36:25,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:25,463 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:36:25,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:25,463 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:36:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:25,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957231802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:25,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:25,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-07-09 17:36:25,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517607977] [2021-07-09 17:36:25,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:36:25,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:36:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:36:25,494 INFO L87 Difference]: Start difference. First operand 2986 states and 8833 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:36:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:26,547 INFO L93 Difference]: Finished difference Result 3474 states and 10057 transitions. [2021-07-09 17:36:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:36:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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 22 [2021-07-09 17:36:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:26,553 INFO L225 Difference]: With dead ends: 3474 [2021-07-09 17:36:26,553 INFO L226 Difference]: Without dead ends: 3459 [2021-07-09 17:36:26,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 947.0ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:36:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-07-09 17:36:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3009. [2021-07-09 17:36:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.95844414893617) internal successors, (8899), 3008 states have internal predecessors, (8899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8899 transitions. [2021-07-09 17:36:26,595 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8899 transitions. Word has length 22 [2021-07-09 17:36:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:26,595 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8899 transitions. [2021-07-09 17:36:26,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 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) [2021-07-09 17:36:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8899 transitions. [2021-07-09 17:36:26,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:36:26,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:26,598 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:26,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56417,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:26,801 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1104639629, now seen corresponding path program 454 times [2021-07-09 17:36:26,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:26,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015597009] [2021-07-09 17:36:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:26,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:26,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015597009] [2021-07-09 17:36:26,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015597009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:26,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930054477] [2021-07-09 17:36:26,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:26,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:36:26,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:26,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:26,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:27,467 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:36:27,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:36:28,055 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 331 [2021-07-09 17:36:28,189 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 345 [2021-07-09 17:36:28,368 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 345 [2021-07-09 17:36:28,540 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 356 [2021-07-09 17:36:28,895 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 407 [2021-07-09 17:36:29,214 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 417 [2021-07-09 17:36:29,524 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 316 [2021-07-09 17:36:30,505 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 300 [2021-07-09 17:36:30,736 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 206 [2021-07-09 17:36:31,553 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 229 [2021-07-09 17:36:31,871 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 421 [2021-07-09 17:36:32,258 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 965 DAG size of output: 491 [2021-07-09 17:36:32,755 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 1013 DAG size of output: 526 [2021-07-09 17:36:33,234 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 1013 DAG size of output: 526 [2021-07-09 17:36:33,748 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 1020 DAG size of output: 533 [2021-07-09 17:36:34,234 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 587 [2021-07-09 17:36:34,919 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 399 [2021-07-09 17:36:35,750 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 265 [2021-07-09 17:36:35,881 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 265 [2021-07-09 17:36:36,026 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 262 [2021-07-09 17:36:36,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:36,455 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:36:36,456 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:36:36,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:36:37,173 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 310 [2021-07-09 17:36:37,283 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 316 [2021-07-09 17:36:37,393 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 316 [2021-07-09 17:36:37,540 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 321 [2021-07-09 17:36:37,789 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 371 [2021-07-09 17:36:38,263 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 314 [2021-07-09 17:36:38,840 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 263 [2021-07-09 17:36:38,944 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 263 [2021-07-09 17:36:39,106 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 281 [2021-07-09 17:36:39,229 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 271 [2021-07-09 17:36:39,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:39,813 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:36:39,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:39,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:36:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:39,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930054477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:39,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:39,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:36:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584987432] [2021-07-09 17:36:39,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:36:39,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:39,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:36:39,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:36:39,844 INFO L87 Difference]: Start difference. First operand 3009 states and 8899 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:36:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:40,919 INFO L93 Difference]: Finished difference Result 3621 states and 10478 transitions. [2021-07-09 17:36:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:36:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:36:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:40,925 INFO L225 Difference]: With dead ends: 3621 [2021-07-09 17:36:40,925 INFO L226 Difference]: Without dead ends: 3606 [2021-07-09 17:36:40,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:36:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-07-09 17:36:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3017. [2021-07-09 17:36:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-07-09 17:36:40,969 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-07-09 17:36:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:40,970 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-07-09 17:36:40,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:36:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-07-09 17:36:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:36:40,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:40,973 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:41,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57293,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,189 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:41,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1949611081, now seen corresponding path program 455 times [2021-07-09 17:36:41,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:41,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987300227] [2021-07-09 17:36:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:41,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:41,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987300227] [2021-07-09 17:36:41,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987300227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:41,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998925520] [2021-07-09 17:36:41,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:41,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:36:41,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:41,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:41,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:41,824 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:36:41,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:41,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:36:42,718 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 274 [2021-07-09 17:36:44,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:36:44,337 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-09 17:36:44,337 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-09 17:36:44,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-09 17:36:45,857 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 262 [2021-07-09 17:36:45,964 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 262 [2021-07-09 17:36:46,127 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 299 [2021-07-09 17:36:46,246 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 247 [2021-07-09 17:36:46,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 17:36:46,986 INFO L628 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 17:36:46,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:36:46,986 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:90, output treesize:15 [2021-07-09 17:36:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:47,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998925520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:47,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:36:47,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 17:36:47,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721397383] [2021-07-09 17:36:47,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 17:36:47,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:36:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 17:36:47,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:36:47,016 INFO L87 Difference]: Start difference. First operand 3017 states and 8930 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:36:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:36:48,042 INFO L93 Difference]: Finished difference Result 3506 states and 10182 transitions. [2021-07-09 17:36:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:36:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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 22 [2021-07-09 17:36:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:36:48,048 INFO L225 Difference]: With dead ends: 3506 [2021-07-09 17:36:48,048 INFO L226 Difference]: Without dead ends: 3496 [2021-07-09 17:36:48,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1051.9ms TimeCoverageRelationStatistics Valid=340, Invalid=2522, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:36:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-07-09 17:36:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3017. [2021-07-09 17:36:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 2.9608753315649867) internal successors, (8930), 3016 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:36:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 8930 transitions. [2021-07-09 17:36:48,088 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 8930 transitions. Word has length 22 [2021-07-09 17:36:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:36:48,088 INFO L482 AbstractCegarLoop]: Abstraction has 3017 states and 8930 transitions. [2021-07-09 17:36:48,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 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) [2021-07-09 17:36:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 8930 transitions. [2021-07-09 17:36:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:36:48,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:36:48,092 INFO L508 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:36:48,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58273,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:48,305 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:36:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:36:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1255070853, now seen corresponding path program 456 times [2021-07-09 17:36:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:36:48,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932919501] [2021-07-09 17:36:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:36:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:36:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:36:48,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:36:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932919501] [2021-07-09 17:36:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932919501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:36:48,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107743652] [2021-07-09 17:36:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:36:48,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:36:48,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:36:48,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:36:48,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:36:48,933 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 17:36:48,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:36:48,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-09 17:36:49,485 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 259 [2021-07-09 17:36:49,697 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 197 [2021-07-09 17:36:50,531 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 194 [2021-07-09 17:36:50,688 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 226 [2021-07-09 17:36:51,373 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 223