/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:53:47,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:53:47,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:53:47,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:53:47,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:53:47,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:53:47,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:53:47,457 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-Delay.epf [2021-08-21 17:53:47,491 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:53:47,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:53:47,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:53:47,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:53:47,494 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:53:47,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:53:47,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:53:47,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:53:47,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:53:47,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:53:47,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:53:47,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:53:47,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:53:47,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:53:47,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:53:47,497 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:53:47,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:53:47,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:53:47,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:53:47,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:53:47,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:53:47,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:53:47,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:53:47,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:53:47,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:53:47,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:53:47,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:53:47,499 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:53:47,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:53:47,499 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:53:47,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:53:47,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:53:47,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:53:47,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:53:47,818 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:53:47,818 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:53:47,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier.wvr.bpl [2021-08-21 17:53:47,819 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier.wvr.bpl' [2021-08-21 17:53:47,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:53:47,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:53:47,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:53:47,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:53:47,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:53:47,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:53:47,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:53:47,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:53:47,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:53:47,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:53:47,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:53:47,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:53:47,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:53:47,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/1) ... [2021-08-21 17:53:47,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:53:47,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:47,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 17:53:47,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 17:53:47,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:53:47,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:53:47,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:53:47,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:53:47,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:53:47,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:53:47,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:53:47,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:53:47,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:53:47,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:53:47,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:53:47,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:53:47,943 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 17:53:47,943 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 17:53:47,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 17:53:47,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-21 17:53:47,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-21 17:53:47,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-21 17:53:47,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-21 17:53:47,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-21 17:53:47,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-21 17:53:47,947 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:53:48,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:53:48,172 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 17:53:48,174 INFO L202 PluginConnector]: Adding new model barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:53:48 BoogieIcfgContainer [2021-08-21 17:53:48,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:53:48,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:53:48,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:53:48,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:53:48,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:53:47" (1/2) ... [2021-08-21 17:53:48,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229fb6ae and model type barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:53:48, skipping insertion in model container [2021-08-21 17:53:48,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:53:48" (2/2) ... [2021-08-21 17:53:48,180 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier.wvr.bpl [2021-08-21 17:53:48,184 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:53:48,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:53:48,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:53:48,184 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:53:48,350 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-08-21 17:53:48,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:53:48,388 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 17:53:48,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-21 17:53:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 7229 states, 5461 states have (on average 1.905511811023622) internal successors, (10406), 7228 states have internal predecessors, (10406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:49,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:49,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:49,360 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:49,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1839359453, now seen corresponding path program 1 times [2021-08-21 17:53:49,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:49,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114840189] [2021-08-21 17:53:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:49,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:49,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:49,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114840189] [2021-08-21 17:53:49,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114840189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:49,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:49,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:53:49,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696779397] [2021-08-21 17:53:49,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:53:49,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:53:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:53:49,528 INFO L87 Difference]: Start difference. First operand has 7229 states, 5461 states have (on average 1.905511811023622) internal successors, (10406), 7228 states have internal predecessors, (10406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:49,610 INFO L93 Difference]: Finished difference Result 5614 states and 7998 transitions. [2021-08-21 17:53:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:53:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:49,620 INFO L225 Difference]: With dead ends: 5614 [2021-08-21 17:53:49,620 INFO L226 Difference]: Without dead ends: 120 [2021-08-21 17:53:49,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:53:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-21 17:53:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-08-21 17:53:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.3277310924369747) internal successors, (158), 119 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 158 transitions. [2021-08-21 17:53:49,660 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 158 transitions. Word has length 47 [2021-08-21 17:53:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:49,661 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 158 transitions. [2021-08-21 17:53:49,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 158 transitions. [2021-08-21 17:53:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:49,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:49,662 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:49,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:53:49,663 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:49,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1863218653, now seen corresponding path program 2 times [2021-08-21 17:53:49,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:49,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768612943] [2021-08-21 17:53:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:49,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:49,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:49,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768612943] [2021-08-21 17:53:49,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768612943] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:49,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:49,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:53:49,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762340123] [2021-08-21 17:53:49,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:53:49,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:53:49,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:53:49,724 INFO L87 Difference]: Start difference. First operand 120 states and 158 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:49,732 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2021-08-21 17:53:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:53:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:49,736 INFO L225 Difference]: With dead ends: 111 [2021-08-21 17:53:49,736 INFO L226 Difference]: Without dead ends: 102 [2021-08-21 17:53:49,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:53:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-21 17:53:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-08-21 17:53:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 101 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-08-21 17:53:49,743 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 47 [2021-08-21 17:53:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:49,743 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-08-21 17:53:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-08-21 17:53:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:49,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:49,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:49,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:53:49,745 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:49,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1446771197, now seen corresponding path program 3 times [2021-08-21 17:53:49,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:49,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231902193] [2021-08-21 17:53:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:49,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:50,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:50,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231902193] [2021-08-21 17:53:50,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231902193] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:50,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:50,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:50,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865218486] [2021-08-21 17:53:50,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:50,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:50,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:50,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:50,745 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:51,592 INFO L93 Difference]: Finished difference Result 178 states and 239 transitions. [2021-08-21 17:53:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:53:51,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:51,596 INFO L225 Difference]: With dead ends: 178 [2021-08-21 17:53:51,596 INFO L226 Difference]: Without dead ends: 164 [2021-08-21 17:53:51,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:53:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-21 17:53:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2021-08-21 17:53:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.336) internal successors, (167), 125 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 167 transitions. [2021-08-21 17:53:51,605 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 167 transitions. Word has length 47 [2021-08-21 17:53:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:51,606 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 167 transitions. [2021-08-21 17:53:51,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 167 transitions. [2021-08-21 17:53:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:51,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:51,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:51,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:53:51,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1065269311, now seen corresponding path program 4 times [2021-08-21 17:53:51,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:51,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451738814] [2021-08-21 17:53:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:51,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:52,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:52,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451738814] [2021-08-21 17:53:52,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451738814] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:52,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:52,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:52,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129141569] [2021-08-21 17:53:52,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:52,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:52,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:52,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:52,092 INFO L87 Difference]: Start difference. First operand 126 states and 167 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:52,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:52,907 INFO L93 Difference]: Finished difference Result 192 states and 256 transitions. [2021-08-21 17:53:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:53:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:52,909 INFO L225 Difference]: With dead ends: 192 [2021-08-21 17:53:52,909 INFO L226 Difference]: Without dead ends: 179 [2021-08-21 17:53:52,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:53:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-21 17:53:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2021-08-21 17:53:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3333333333333333) internal successors, (168), 126 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 168 transitions. [2021-08-21 17:53:52,916 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 168 transitions. Word has length 47 [2021-08-21 17:53:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:52,917 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 168 transitions. [2021-08-21 17:53:52,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 168 transitions. [2021-08-21 17:53:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:52,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:52,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:52,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:53:52,918 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:52,919 INFO L82 PathProgramCache]: Analyzing trace with hash -790305697, now seen corresponding path program 5 times [2021-08-21 17:53:52,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:52,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464312759] [2021-08-21 17:53:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:52,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:53,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:53,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464312759] [2021-08-21 17:53:53,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464312759] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:53,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:53,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:53,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829813147] [2021-08-21 17:53:53,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:53,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:53,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:53,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:53,390 INFO L87 Difference]: Start difference. First operand 127 states and 168 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:54,165 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2021-08-21 17:53:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:54,167 INFO L225 Difference]: With dead ends: 177 [2021-08-21 17:53:54,167 INFO L226 Difference]: Without dead ends: 160 [2021-08-21 17:53:54,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:53:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-21 17:53:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2021-08-21 17:53:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3305785123966942) internal successors, (161), 121 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 161 transitions. [2021-08-21 17:53:54,173 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 161 transitions. Word has length 47 [2021-08-21 17:53:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:54,173 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 161 transitions. [2021-08-21 17:53:54,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 161 transitions. [2021-08-21 17:53:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:54,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:54,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:54,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 17:53:54,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:54,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1264736319, now seen corresponding path program 6 times [2021-08-21 17:53:54,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:54,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50032780] [2021-08-21 17:53:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:54,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:54,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:54,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50032780] [2021-08-21 17:53:54,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50032780] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:54,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:54,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-21 17:53:54,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890179108] [2021-08-21 17:53:54,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:53:54,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:53:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:53:54,618 INFO L87 Difference]: Start difference. First operand 122 states and 161 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:55,350 INFO L93 Difference]: Finished difference Result 171 states and 232 transitions. [2021-08-21 17:53:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:53:55,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:55,352 INFO L225 Difference]: With dead ends: 171 [2021-08-21 17:53:55,352 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 17:53:55,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:53:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 17:53:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2021-08-21 17:53:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3252032520325203) internal successors, (163), 123 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 163 transitions. [2021-08-21 17:53:55,357 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 163 transitions. Word has length 47 [2021-08-21 17:53:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:55,357 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 163 transitions. [2021-08-21 17:53:55,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 163 transitions. [2021-08-21 17:53:55,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:55,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:55,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:55,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 17:53:55,359 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash -874774591, now seen corresponding path program 7 times [2021-08-21 17:53:55,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:55,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922099277] [2021-08-21 17:53:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:55,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:55,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:55,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922099277] [2021-08-21 17:53:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922099277] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:55,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:55,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:55,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250192652] [2021-08-21 17:53:55,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:55,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:55,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:55,817 INFO L87 Difference]: Start difference. First operand 124 states and 163 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:56,483 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2021-08-21 17:53:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:53:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:56,485 INFO L225 Difference]: With dead ends: 177 [2021-08-21 17:53:56,485 INFO L226 Difference]: Without dead ends: 164 [2021-08-21 17:53:56,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:53:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-08-21 17:53:56,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2021-08-21 17:53:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.32) internal successors, (165), 125 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2021-08-21 17:53:56,490 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 47 [2021-08-21 17:53:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:56,490 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2021-08-21 17:53:56,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2021-08-21 17:53:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:56,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:56,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:56,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 17:53:56,492 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:56,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:56,492 INFO L82 PathProgramCache]: Analyzing trace with hash -599810977, now seen corresponding path program 8 times [2021-08-21 17:53:56,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:56,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723971844] [2021-08-21 17:53:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:56,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:56,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:56,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723971844] [2021-08-21 17:53:56,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723971844] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:56,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:56,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:56,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147720205] [2021-08-21 17:53:56,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:56,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:56,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:56,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:56,922 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:57,521 INFO L93 Difference]: Finished difference Result 162 states and 216 transitions. [2021-08-21 17:53:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:53:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:57,522 INFO L225 Difference]: With dead ends: 162 [2021-08-21 17:53:57,522 INFO L226 Difference]: Without dead ends: 140 [2021-08-21 17:53:57,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:53:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-21 17:53:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-08-21 17:53:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3217391304347825) internal successors, (152), 115 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 152 transitions. [2021-08-21 17:53:57,525 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 152 transitions. Word has length 47 [2021-08-21 17:53:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:57,525 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 152 transitions. [2021-08-21 17:53:57,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 152 transitions. [2021-08-21 17:53:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:57,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:57,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:57,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 17:53:57,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1627125251, now seen corresponding path program 9 times [2021-08-21 17:53:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:57,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194297398] [2021-08-21 17:53:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:57,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:57,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:57,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194297398] [2021-08-21 17:53:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194297398] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:57,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:53:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676701789] [2021-08-21 17:53:57,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:53:57,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:53:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:53:57,548 INFO L87 Difference]: Start difference. First operand 116 states and 152 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:57,551 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2021-08-21 17:53:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:53:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:57,552 INFO L225 Difference]: With dead ends: 103 [2021-08-21 17:53:57,552 INFO L226 Difference]: Without dead ends: 93 [2021-08-21 17:53:57,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:53:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-21 17:53:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-08-21 17:53:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 92 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2021-08-21 17:53:57,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 47 [2021-08-21 17:53:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:57,555 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2021-08-21 17:53:57,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2021-08-21 17:53:57,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:57,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:57,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:57,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 17:53:57,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:57,556 INFO L82 PathProgramCache]: Analyzing trace with hash 135391, now seen corresponding path program 10 times [2021-08-21 17:53:57,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:57,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532085857] [2021-08-21 17:53:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:57,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:57,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:57,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532085857] [2021-08-21 17:53:57,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532085857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:57,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:57,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:57,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055429702] [2021-08-21 17:53:57,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:57,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:57,973 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:58,552 INFO L93 Difference]: Finished difference Result 135 states and 172 transitions. [2021-08-21 17:53:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:53:58,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:58,553 INFO L225 Difference]: With dead ends: 135 [2021-08-21 17:53:58,554 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 17:53:58,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:53:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 17:53:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-08-21 17:53:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 110 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2021-08-21 17:53:58,557 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 47 [2021-08-21 17:53:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:58,557 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2021-08-21 17:53:58,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2021-08-21 17:53:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:58,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:58,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:58,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 17:53:58,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1783062179, now seen corresponding path program 11 times [2021-08-21 17:53:58,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:58,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314551041] [2021-08-21 17:53:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:58,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:58,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:58,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314551041] [2021-08-21 17:53:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314551041] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:53:58,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:53:58,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:53:58,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877094164] [2021-08-21 17:53:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:53:58,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:53:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:53:58,964 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:59,652 INFO L93 Difference]: Finished difference Result 149 states and 189 transitions. [2021-08-21 17:53:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:53:59,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:53:59,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:59,653 INFO L225 Difference]: With dead ends: 149 [2021-08-21 17:53:59,653 INFO L226 Difference]: Without dead ends: 136 [2021-08-21 17:53:59,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:53:59,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-21 17:53:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-08-21 17:53:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 111 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2021-08-21 17:53:59,657 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 47 [2021-08-21 17:53:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:59,657 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2021-08-21 17:53:59,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2021-08-21 17:53:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:53:59,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:59,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:59,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 17:53:59,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:53:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2058025793, now seen corresponding path program 12 times [2021-08-21 17:53:59,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:59,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073296449] [2021-08-21 17:53:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:59,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:00,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:00,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073296449] [2021-08-21 17:54:00,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073296449] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:00,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:00,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:00,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604472293] [2021-08-21 17:54:00,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:00,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:00,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:00,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:00,067 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:00,677 INFO L93 Difference]: Finished difference Result 134 states and 169 transitions. [2021-08-21 17:54:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:54:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:00,678 INFO L225 Difference]: With dead ends: 134 [2021-08-21 17:54:00,678 INFO L226 Difference]: Without dead ends: 117 [2021-08-21 17:54:00,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:54:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-21 17:54:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2021-08-21 17:54:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 106 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) [2021-08-21 17:54:00,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2021-08-21 17:54:00,681 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 47 [2021-08-21 17:54:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:00,681 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2021-08-21 17:54:00,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2021-08-21 17:54:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:00,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:00,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:00,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 17:54:00,682 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1583595171, now seen corresponding path program 13 times [2021-08-21 17:54:00,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:00,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197332410] [2021-08-21 17:54:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:00,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:01,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:01,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197332410] [2021-08-21 17:54:01,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197332410] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:01,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:01,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-21 17:54:01,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117077681] [2021-08-21 17:54:01,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:54:01,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:01,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:54:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:54:01,084 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:01,768 INFO L93 Difference]: Finished difference Result 131 states and 166 transitions. [2021-08-21 17:54:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:54:01,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:01,769 INFO L225 Difference]: With dead ends: 131 [2021-08-21 17:54:01,769 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 17:54:01,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 644.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:54:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 17:54:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-08-21 17:54:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 107 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2021-08-21 17:54:01,773 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 47 [2021-08-21 17:54:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:01,773 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2021-08-21 17:54:01,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2021-08-21 17:54:01,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:01,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:01,774 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:01,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 17:54:01,774 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1973556899, now seen corresponding path program 14 times [2021-08-21 17:54:01,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:01,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416201881] [2021-08-21 17:54:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:01,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:02,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:02,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416201881] [2021-08-21 17:54:02,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416201881] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:02,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:02,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:02,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518921835] [2021-08-21 17:54:02,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:02,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:02,147 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:02,735 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2021-08-21 17:54:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:54:02,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:02,736 INFO L225 Difference]: With dead ends: 139 [2021-08-21 17:54:02,736 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 17:54:02,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:54:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 17:54:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 110. [2021-08-21 17:54:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 109 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2021-08-21 17:54:02,739 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 47 [2021-08-21 17:54:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:02,740 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2021-08-21 17:54:02,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2021-08-21 17:54:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:02,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:02,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:02,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 17:54:02,741 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2046446783, now seen corresponding path program 15 times [2021-08-21 17:54:02,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:02,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859886903] [2021-08-21 17:54:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:02,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:03,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:03,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859886903] [2021-08-21 17:54:03,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859886903] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:03,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:03,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:03,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077655551] [2021-08-21 17:54:03,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:03,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:03,105 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:03,705 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-08-21 17:54:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:54:03,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:03,706 INFO L225 Difference]: With dead ends: 124 [2021-08-21 17:54:03,706 INFO L226 Difference]: Without dead ends: 86 [2021-08-21 17:54:03,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:54:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-21 17:54:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-08-21 17:54:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-08-21 17:54:03,709 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 47 [2021-08-21 17:54:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:03,709 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-08-21 17:54:03,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-08-21 17:54:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:03,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:03,710 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:03,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 17:54:03,710 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:03,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:03,710 INFO L82 PathProgramCache]: Analyzing trace with hash -633681697, now seen corresponding path program 16 times [2021-08-21 17:54:03,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:03,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703069923] [2021-08-21 17:54:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:03,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:04,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:04,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703069923] [2021-08-21 17:54:04,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703069923] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:04,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:04,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:04,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352073392] [2021-08-21 17:54:04,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:04,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:04,114 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:04,690 INFO L93 Difference]: Finished difference Result 124 states and 157 transitions. [2021-08-21 17:54:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:54:04,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:04,691 INFO L225 Difference]: With dead ends: 124 [2021-08-21 17:54:04,691 INFO L226 Difference]: Without dead ends: 110 [2021-08-21 17:54:04,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:54:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-21 17:54:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2021-08-21 17:54:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 101 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2021-08-21 17:54:04,695 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 47 [2021-08-21 17:54:04,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:04,695 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2021-08-21 17:54:04,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2021-08-21 17:54:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:04,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:04,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:04,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 17:54:04,696 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1149245091, now seen corresponding path program 17 times [2021-08-21 17:54:04,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:04,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060102372] [2021-08-21 17:54:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:04,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:05,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:05,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060102372] [2021-08-21 17:54:05,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060102372] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:05,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:05,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:05,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385073376] [2021-08-21 17:54:05,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:05,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:05,068 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:05,691 INFO L93 Difference]: Finished difference Result 138 states and 174 transitions. [2021-08-21 17:54:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:54:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:05,692 INFO L225 Difference]: With dead ends: 138 [2021-08-21 17:54:05,692 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 17:54:05,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:54:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 17:54:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2021-08-21 17:54:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 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) [2021-08-21 17:54:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-08-21 17:54:05,695 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 47 [2021-08-21 17:54:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:05,695 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-08-21 17:54:05,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-08-21 17:54:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:05,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:05,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:05,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-21 17:54:05,696 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:05,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1424208705, now seen corresponding path program 18 times [2021-08-21 17:54:05,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:05,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811317974] [2021-08-21 17:54:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:05,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:06,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:06,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811317974] [2021-08-21 17:54:06,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811317974] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:06,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:06,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:06,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671990850] [2021-08-21 17:54:06,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:06,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:06,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:06,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:06,108 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:06,683 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2021-08-21 17:54:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:54:06,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:06,684 INFO L225 Difference]: With dead ends: 123 [2021-08-21 17:54:06,684 INFO L226 Difference]: Without dead ends: 106 [2021-08-21 17:54:06,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:54:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-21 17:54:06,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2021-08-21 17:54:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2474226804123711) internal successors, (121), 97 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-08-21 17:54:06,687 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 47 [2021-08-21 17:54:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:06,687 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-08-21 17:54:06,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-08-21 17:54:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:06,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:06,688 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:06,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-21 17:54:06,688 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:06,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:06,688 INFO L82 PathProgramCache]: Analyzing trace with hash 949778083, now seen corresponding path program 19 times [2021-08-21 17:54:06,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:06,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411131100] [2021-08-21 17:54:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:06,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:07,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:07,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411131100] [2021-08-21 17:54:07,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411131100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:07,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:07,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-21 17:54:07,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335486305] [2021-08-21 17:54:07,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:54:07,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:07,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:54:07,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:54:07,038 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:07,616 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2021-08-21 17:54:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:54:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:07,617 INFO L225 Difference]: With dead ends: 120 [2021-08-21 17:54:07,617 INFO L226 Difference]: Without dead ends: 103 [2021-08-21 17:54:07,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:54:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-21 17:54:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-08-21 17:54:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 98 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2021-08-21 17:54:07,623 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 47 [2021-08-21 17:54:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:07,623 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2021-08-21 17:54:07,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2021-08-21 17:54:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:07,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:07,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:07,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-21 17:54:07,624 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1339739811, now seen corresponding path program 20 times [2021-08-21 17:54:07,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:07,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678104532] [2021-08-21 17:54:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:07,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:07,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:07,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678104532] [2021-08-21 17:54:07,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678104532] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:07,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:07,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:07,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571655930] [2021-08-21 17:54:07,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:07,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:07,985 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:08,639 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2021-08-21 17:54:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:54:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:08,640 INFO L225 Difference]: With dead ends: 128 [2021-08-21 17:54:08,640 INFO L226 Difference]: Without dead ends: 115 [2021-08-21 17:54:08,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:54:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-21 17:54:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2021-08-21 17:54:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.24) internal successors, (124), 100 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2021-08-21 17:54:08,643 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 47 [2021-08-21 17:54:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:08,643 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2021-08-21 17:54:08,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2021-08-21 17:54:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:08,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:08,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:08,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 17:54:08,644 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1614703425, now seen corresponding path program 21 times [2021-08-21 17:54:08,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:08,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871251995] [2021-08-21 17:54:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:08,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:09,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:09,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871251995] [2021-08-21 17:54:09,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871251995] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:09,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:09,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-21 17:54:09,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538316809] [2021-08-21 17:54:09,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:54:09,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:54:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:54:09,024 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:09,580 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2021-08-21 17:54:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:54:09,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:09,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:09,581 INFO L225 Difference]: With dead ends: 113 [2021-08-21 17:54:09,581 INFO L226 Difference]: Without dead ends: 72 [2021-08-21 17:54:09,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:54:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-21 17:54:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-21 17:54:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2021-08-21 17:54:09,583 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 47 [2021-08-21 17:54:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:09,583 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2021-08-21 17:54:09,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2021-08-21 17:54:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:54:09,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:09,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:09,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 17:54:09,584 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:54:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 30456317, now seen corresponding path program 22 times [2021-08-21 17:54:09,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:09,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333226268] [2021-08-21 17:54:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:09,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:09,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:09,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333226268] [2021-08-21 17:54:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333226268] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:54:09,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:54:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:54:09,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349660522] [2021-08-21 17:54:09,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:54:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:54:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:54:09,599 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:09,599 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2021-08-21 17:54:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:54:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:54:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:09,600 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:54:09,600 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 17:54:09,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:54:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 17:54:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 17:54:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 17:54:09,601 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-08-21 17:54:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:09,601 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 17:54:09,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 17:54:09,601 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 17:54:09,603 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0INUSE_VIOLATION [2021-08-21 17:54:09,604 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1INUSE_VIOLATION [2021-08-21 17:54:09,604 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:54:09,604 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 17:54:09,604 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8INUSE_VIOLATION [2021-08-21 17:54:09,604 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread4Err7INUSE_VIOLATION [2021-08-21 17:54:09,605 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread4Err9INUSE_VIOLATION [2021-08-21 17:54:09,605 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Thread1of1ForFork2Err3INUSE_VIOLATION [2021-08-21 17:54:09,605 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Thread1of1ForFork2Err4INUSE_VIOLATION [2021-08-21 17:54:09,605 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread4Thread1of1ForFork4Err5INUSE_VIOLATION [2021-08-21 17:54:09,605 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread4Thread1of1ForFork4Err6INUSE_VIOLATION [2021-08-21 17:54:09,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 17:54:09,609 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:54:09,609 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:54:09,610 INFO L202 PluginConnector]: Adding new model barrier.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:54:09 BasicIcfg [2021-08-21 17:54:09,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:54:09,612 INFO L168 Benchmark]: Toolchain (without parser) took 21768.83 ms. Allocated memory was 203.4 MB in the beginning and 487.6 MB in the end (delta: 284.2 MB). Free memory was 184.2 MB in the beginning and 297.9 MB in the end (delta: -113.7 MB). Peak memory consumption was 171.5 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:09,612 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 203.4 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:54:09,612 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.42 ms. Allocated memory is still 203.4 MB. Free memory was 184.0 MB in the beginning and 182.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:09,612 INFO L168 Benchmark]: Boogie Preprocessor took 14.73 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 181.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:09,613 INFO L168 Benchmark]: RCFGBuilder took 289.36 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 167.5 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:09,613 INFO L168 Benchmark]: TraceAbstraction took 21435.19 ms. Allocated memory was 203.4 MB in the beginning and 487.6 MB in the end (delta: 284.2 MB). Free memory was 166.9 MB in the beginning and 297.9 MB in the end (delta: -130.9 MB). Peak memory consumption was 154.8 MB. Max. memory is 8.0 GB. [2021-08-21 17:54:09,614 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 203.4 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.42 ms. Allocated memory is still 203.4 MB. Free memory was 184.0 MB in the beginning and 182.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.73 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 181.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 289.36 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 167.5 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21435.19 ms. Allocated memory was 203.4 MB in the beginning and 487.6 MB in the end (delta: 284.2 MB). Free memory was 166.9 MB in the beginning and 297.9 MB in the end (delta: -130.9 MB). Peak memory consumption was 154.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 25915, positive: 23922, positive conditional: 23922, positive unconditional: 0, negative: 1993, negative conditional: 1993, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 24475, positive: 23922, positive conditional: 0, positive unconditional: 23922, negative: 553, negative conditional: 0, negative unconditional: 553, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 668, positive: 654, positive conditional: 0, positive unconditional: 654, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 668, positive: 652, positive conditional: 0, positive unconditional: 652, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 16, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 14, negative conditional: 0, negative unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 59, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 54, negative conditional: 0, negative unconditional: 54, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 24475, positive: 23268, positive conditional: 0, positive unconditional: 23268, negative: 539, negative conditional: 0, negative unconditional: 539, unknown: 668, unknown conditional: 0, unknown unconditional: 668] , Statistics on independence cache: Total cache size (in pairs): 668, Positive cache size: 654, Positive conditional cache size: 0, Positive unconditional cache size: 654, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Independence queries for same thread: 1440 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 95]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 112 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 21227.1ms, OverallIterations: 22, TraceHistogramMax: 1, EmptinessCheckTime: 82.5ms, AutomataDifference: 11925.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 900.0ms, PartialOrderReductionTime: 885.6ms, HoareTripleCheckerStatistics: 1156 SDtfs, 1798 SDslu, 11799 SDs, 0 SdLazy, 9436 SolverSat, 359 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3800.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 681 GetRequests, 44 SyntacticMatches, 21 SemanticMatches, 616 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3272 ImplicationChecksByTransitivity, 10992.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7229occurred in iteration=0, InterpolantAutomatonStates: 459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 101.4ms AutomataMinimizationTime, 22 MinimizatonAttempts, 342 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 36.6ms SsaConstructionTime, 164.2ms SatisfiabilityAnalysisTime, 7797.5ms InterpolantComputationTime, 1034 NumberOfCodeBlocks, 1034 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1012 ConstructedInterpolants, 0 QuantifiedInterpolants, 12231 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 17:54:09,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...