/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true -i ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 14:52:34,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 14:52:34,499 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-09 14:52:34,524 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 14:52:34,525 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 14:52:34,525 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 14:52:34,525 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 14:52:34,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 14:52:34,526 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 14:52:34,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 14:52:34,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 14:52:34,530 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 14:52:34,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 14:52:34,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 14:52:34,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 14:52:34,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 14:52:34,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 14:52:34,532 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 14:52:34,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 14:52:34,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:52:34,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 14:52:34,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 14:52:34,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 14:52:34,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 14:52:34,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 14:52:34,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 14:52:34,535 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 14:52:34,535 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 14:52:34,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 14:52:34,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 14:52:34,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 14:52:34,754 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 14:52:34,755 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 14:52:34,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-12-09 14:52:35,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 14:52:36,070 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 14:52:36,070 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-12-09 14:52:36,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00870c61a/72ce21784ed9458093c5a252bce3ee1a/FLAG49ed3f2b9 [2023-12-09 14:52:36,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00870c61a/72ce21784ed9458093c5a252bce3ee1a [2023-12-09 14:52:36,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 14:52:36,092 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 14:52:36,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 14:52:36,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 14:52:36,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 14:52:36,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c23db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36, skipping insertion in model container [2023-12-09 14:52:36,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,129 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 14:52:36,340 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i[30570,30583] [2023-12-09 14:52:36,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:52:36,359 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 14:52:36,402 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i[30570,30583] [2023-12-09 14:52:36,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:52:36,467 INFO L206 MainTranslator]: Completed translation [2023-12-09 14:52:36,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36 WrapperNode [2023-12-09 14:52:36,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 14:52:36,471 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 14:52:36,471 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 14:52:36,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 14:52:36,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,523 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 109 [2023-12-09 14:52:36,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 14:52:36,524 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 14:52:36,524 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 14:52:36,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 14:52:36,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,559 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,561 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 14:52:36,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 14:52:36,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 14:52:36,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 14:52:36,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (1/1) ... [2023-12-09 14:52:36,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:52:36,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:36,612 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) [2023-12-09 14:52:36,642 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 [2023-12-09 14:52:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-09 14:52:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 14:52:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 14:52:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 14:52:36,668 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-09 14:52:36,756 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 14:52:36,757 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 14:52:36,897 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 14:52:36,967 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 14:52:36,967 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-09 14:52:36,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:52:36 BoogieIcfgContainer [2023-12-09 14:52:36,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 14:52:36,970 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 14:52:36,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 14:52:36,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 14:52:36,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:52:36" (1/3) ... [2023-12-09 14:52:36,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d32704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:52:36, skipping insertion in model container [2023-12-09 14:52:36,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:52:36" (2/3) ... [2023-12-09 14:52:36,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d32704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:52:36, skipping insertion in model container [2023-12-09 14:52:36,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:52:36" (3/3) ... [2023-12-09 14:52:36,990 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2023-12-09 14:52:37,003 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 14:52:37,004 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-09 14:52:37,004 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 14:52:37,044 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:37,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 96 transitions, 196 flow [2023-12-09 14:52:37,107 INFO L124 PetriNetUnfolderBase]: 11/107 cut-off events. [2023-12-09 14:52:37,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:37,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 107 events. 11/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 63. Up to 4 conditions per place. [2023-12-09 14:52:37,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 96 transitions, 196 flow [2023-12-09 14:52:37,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 96 transitions, 196 flow [2023-12-09 14:52:37,121 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:37,125 INFO L362 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9a9c4ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:37,126 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-09 14:52:37,136 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:37,136 INFO L124 PetriNetUnfolderBase]: 4/62 cut-off events. [2023-12-09 14:52:37,136 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:52:37,137 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:37,137 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:37,138 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:52:37,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1579311485, now seen corresponding path program 1 times [2023-12-09 14:52:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:37,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769692027] [2023-12-09 14:52:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:37,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:37,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769692027] [2023-12-09 14:52:37,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769692027] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:37,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:37,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559530266] [2023-12-09 14:52:37,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:37,353 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:37,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:37,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:37,376 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 96 [2023-12-09 14:52:37,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:37,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 96 [2023-12-09 14:52:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:37,417 INFO L124 PetriNetUnfolderBase]: 5/95 cut-off events. [2023-12-09 14:52:37,418 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:52:37,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 95 events. 5/95 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 58 event pairs, 0 based on Foata normal form. 9/97 useless extension candidates. Maximal degree in co-relation 56. Up to 14 conditions per place. [2023-12-09 14:52:37,419 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 15 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-12-09 14:52:37,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 214 flow [2023-12-09 14:52:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-12-09 14:52:37,429 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2023-12-09 14:52:37,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-12-09 14:52:37,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-12-09 14:52:37,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:37,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-12-09 14:52:37,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,440 INFO L308 CegarLoopForPetriNet]: 89 programPoint places, -5 predicate places. [2023-12-09 14:52:37,440 INFO L500 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 214 flow [2023-12-09 14:52:37,440 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,440 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:37,441 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:37,441 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 14:52:37,441 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:52:37,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1060458199, now seen corresponding path program 1 times [2023-12-09 14:52:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:37,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736800220] [2023-12-09 14:52:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:37,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:37,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736800220] [2023-12-09 14:52:37,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736800220] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:37,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635274778] [2023-12-09 14:52:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:37,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:37,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-09 14:52:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:37,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 14:52:37,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:37,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:52:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:37,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635274778] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:52:37,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:52:37,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 14:52:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220096822] [2023-12-09 14:52:37,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:52:37,755 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 14:52:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 14:52:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 14:52:37,760 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 96 [2023-12-09 14:52:37,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 214 flow. Second operand has 10 states, 10 states have (on average 76.2) internal successors, (762), 10 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:37,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 96 [2023-12-09 14:52:37,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:37,861 INFO L124 PetriNetUnfolderBase]: 5/105 cut-off events. [2023-12-09 14:52:37,861 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-12-09 14:52:37,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 105 events. 5/105 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 88. Up to 19 conditions per place. [2023-12-09 14:52:37,864 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 16 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2023-12-09 14:52:37,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 288 flow [2023-12-09 14:52:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 14:52:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 14:52:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 693 transitions. [2023-12-09 14:52:37,869 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8020833333333334 [2023-12-09 14:52:37,869 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 693 transitions. [2023-12-09 14:52:37,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 693 transitions. [2023-12-09 14:52:37,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:37,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 693 transitions. [2023-12-09 14:52:37,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 77.0) internal successors, (693), 9 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,876 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,876 INFO L308 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2023-12-09 14:52:37,877 INFO L500 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 288 flow [2023-12-09 14:52:37,877 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.2) internal successors, (762), 10 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:37,877 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:37,877 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:37,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-09 14:52:38,081 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:38,082 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:52:38,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1744440449, now seen corresponding path program 2 times [2023-12-09 14:52:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:38,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645325582] [2023-12-09 14:52:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:38,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:38,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645325582] [2023-12-09 14:52:38,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645325582] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:38,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343783275] [2023-12-09 14:52:38,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-09 14:52:38,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:38,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:38,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:38,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-09 14:52:38,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-09 14:52:38,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-09 14:52:38,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-09 14:52:38,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:38,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:52:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-09 14:52:38,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343783275] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:52:38,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:52:38,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-12-09 14:52:38,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367550243] [2023-12-09 14:52:38,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:52:38,428 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-09 14:52:38,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:38,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-09 14:52:38,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-12-09 14:52:38,434 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 96 [2023-12-09 14:52:38,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 288 flow. Second operand has 15 states, 15 states have (on average 76.46666666666667) internal successors, (1147), 15 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:38,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:38,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 96 [2023-12-09 14:52:38,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:38,600 INFO L124 PetriNetUnfolderBase]: 5/129 cut-off events. [2023-12-09 14:52:38,600 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-12-09 14:52:38,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 129 events. 5/129 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 174. Up to 31 conditions per place. [2023-12-09 14:52:38,601 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 22 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2023-12-09 14:52:38,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 110 transitions, 452 flow [2023-12-09 14:52:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-09 14:52:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-09 14:52:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1375 transitions. [2023-12-09 14:52:38,605 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7957175925925926 [2023-12-09 14:52:38,605 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1375 transitions. [2023-12-09 14:52:38,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1375 transitions. [2023-12-09 14:52:38,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:38,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1375 transitions. [2023-12-09 14:52:38,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 76.38888888888889) internal successors, (1375), 18 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:38,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 96.0) internal successors, (1824), 19 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:38,612 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 96.0) internal successors, (1824), 19 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:38,613 INFO L308 CegarLoopForPetriNet]: 89 programPoint places, 20 predicate places. [2023-12-09 14:52:38,613 INFO L500 AbstractCegarLoop]: Abstraction has has 109 places, 110 transitions, 452 flow [2023-12-09 14:52:38,614 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.46666666666667) internal successors, (1147), 15 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:38,614 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:38,614 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:38,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-09 14:52:38,818 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-09 14:52:38,819 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:52:38,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1895951237, now seen corresponding path program 3 times [2023-12-09 14:52:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:38,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198261212] [2023-12-09 14:52:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:38,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:38,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:38,897 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:38,897 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-09 14:52:38,899 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-09 14:52:38,899 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-09 14:52:38,899 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 14:52:38,899 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-09 14:52:38,905 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:38,905 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 14:52:38,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:38,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 147 transitions, 304 flow [2023-12-09 14:52:38,962 INFO L124 PetriNetUnfolderBase]: 19/171 cut-off events. [2023-12-09 14:52:38,964 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-09 14:52:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 171 events. 19/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 316 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-12-09 14:52:38,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 147 transitions, 304 flow [2023-12-09 14:52:38,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 147 transitions, 304 flow [2023-12-09 14:52:38,969 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:38,971 INFO L362 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9a9c4ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:38,971 INFO L363 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-09 14:52:38,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:38,976 INFO L124 PetriNetUnfolderBase]: 6/90 cut-off events. [2023-12-09 14:52:38,976 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-09 14:52:38,976 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:38,977 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:38,977 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:52:38,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash -466444549, now seen corresponding path program 1 times [2023-12-09 14:52:38,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:38,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075646358] [2023-12-09 14:52:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:38,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:39,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:39,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075646358] [2023-12-09 14:52:39,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075646358] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:39,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:39,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:39,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062740316] [2023-12-09 14:52:39,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:39,060 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:39,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:39,061 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 147 [2023-12-09 14:52:39,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 147 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:39,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 147 [2023-12-09 14:52:39,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:39,121 INFO L124 PetriNetUnfolderBase]: 37/321 cut-off events. [2023-12-09 14:52:39,121 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-12-09 14:52:39,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 321 events. 37/321 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1165 event pairs, 20 based on Foata normal form. 61/348 useless extension candidates. Maximal degree in co-relation 127. Up to 59 conditions per place. [2023-12-09 14:52:39,125 INFO L140 encePairwiseOnDemand]: 135/147 looper letters, 20 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2023-12-09 14:52:39,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 324 flow [2023-12-09 14:52:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2023-12-09 14:52:39,126 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8707482993197279 [2023-12-09 14:52:39,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2023-12-09 14:52:39,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2023-12-09 14:52:39,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:39,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2023-12-09 14:52:39,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,130 INFO L308 CegarLoopForPetriNet]: 135 programPoint places, -6 predicate places. [2023-12-09 14:52:39,130 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 324 flow [2023-12-09 14:52:39,130 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,131 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:39,133 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:39,133 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 14:52:39,136 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:52:39,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1201708711, now seen corresponding path program 1 times [2023-12-09 14:52:39,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:39,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616661491] [2023-12-09 14:52:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:39,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616661491] [2023-12-09 14:52:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616661491] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43346260] [2023-12-09 14:52:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:39,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:39,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:39,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:39,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-09 14:52:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:39,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 14:52:39,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:39,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:52:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43346260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:52:39,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:52:39,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 14:52:39,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334185807] [2023-12-09 14:52:39,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:52:39,347 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 14:52:39,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 14:52:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 14:52:39,350 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 147 [2023-12-09 14:52:39,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 324 flow. Second operand has 10 states, 10 states have (on average 118.3) internal successors, (1183), 10 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:39,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 147 [2023-12-09 14:52:39,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:39,451 INFO L124 PetriNetUnfolderBase]: 37/331 cut-off events. [2023-12-09 14:52:39,451 INFO L125 PetriNetUnfolderBase]: For 52/62 co-relation queries the response was YES. [2023-12-09 14:52:39,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 331 events. 37/331 cut-off events. For 52/62 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1164 event pairs, 20 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 153. Up to 64 conditions per place. [2023-12-09 14:52:39,453 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 21 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2023-12-09 14:52:39,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 142 transitions, 408 flow [2023-12-09 14:52:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 14:52:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 14:52:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1076 transitions. [2023-12-09 14:52:39,456 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8133030990173847 [2023-12-09 14:52:39,456 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1076 transitions. [2023-12-09 14:52:39,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1076 transitions. [2023-12-09 14:52:39,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:39,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1076 transitions. [2023-12-09 14:52:39,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.55555555555556) internal successors, (1076), 9 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,460 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,463 INFO L308 CegarLoopForPetriNet]: 135 programPoint places, 2 predicate places. [2023-12-09 14:52:39,463 INFO L500 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 408 flow [2023-12-09 14:52:39,464 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.3) internal successors, (1183), 10 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:39,464 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:39,464 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:39,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-09 14:52:39,668 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:39,668 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:52:39,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 105601535, now seen corresponding path program 2 times [2023-12-09 14:52:39,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:39,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950911637] [2023-12-09 14:52:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:39,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:39,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950911637] [2023-12-09 14:52:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950911637] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204753492] [2023-12-09 14:52:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-09 14:52:39,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:39,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:39,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-09 14:52:39,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-09 14:52:39,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-09 14:52:39,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-09 14:52:39,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:39,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:52:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-09 14:52:40,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204753492] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:52:40,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:52:40,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-12-09 14:52:40,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267809159] [2023-12-09 14:52:40,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:52:40,003 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-09 14:52:40,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-09 14:52:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-12-09 14:52:40,005 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 147 [2023-12-09 14:52:40,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 408 flow. Second operand has 15 states, 15 states have (on average 118.53333333333333) internal successors, (1778), 15 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:40,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 147 [2023-12-09 14:52:40,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:40,172 INFO L124 PetriNetUnfolderBase]: 37/355 cut-off events. [2023-12-09 14:52:40,173 INFO L125 PetriNetUnfolderBase]: For 133/153 co-relation queries the response was YES. [2023-12-09 14:52:40,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 355 events. 37/355 cut-off events. For 133/153 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1156 event pairs, 20 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 244. Up to 76 conditions per place. [2023-12-09 14:52:40,175 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 27 selfloop transitions, 18 changer transitions 0/157 dead transitions. [2023-12-09 14:52:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 582 flow [2023-12-09 14:52:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-09 14:52:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-09 14:52:40,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2136 transitions. [2023-12-09 14:52:40,179 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8072562358276644 [2023-12-09 14:52:40,179 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2136 transitions. [2023-12-09 14:52:40,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2136 transitions. [2023-12-09 14:52:40,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:40,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2136 transitions. [2023-12-09 14:52:40,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 118.66666666666667) internal successors, (2136), 18 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 147.0) internal successors, (2793), 19 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,187 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 147.0) internal successors, (2793), 19 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,188 INFO L308 CegarLoopForPetriNet]: 135 programPoint places, 19 predicate places. [2023-12-09 14:52:40,188 INFO L500 AbstractCegarLoop]: Abstraction has has 154 places, 157 transitions, 582 flow [2023-12-09 14:52:40,188 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 118.53333333333333) internal successors, (1778), 15 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,189 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:40,189 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:40,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-09 14:52:40,393 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:40,394 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:52:40,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1184610045, now seen corresponding path program 3 times [2023-12-09 14:52:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:40,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177862163] [2023-12-09 14:52:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:40,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:40,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:40,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:40,439 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:40,440 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-12-09 14:52:40,440 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-09 14:52:40,440 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-09 14:52:40,440 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-09 14:52:40,440 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-09 14:52:40,440 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-09 14:52:40,441 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:40,441 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 14:52:40,471 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:40,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 198 transitions, 414 flow [2023-12-09 14:52:40,493 INFO L124 PetriNetUnfolderBase]: 27/235 cut-off events. [2023-12-09 14:52:40,494 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-09 14:52:40,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 235 events. 27/235 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 595 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-12-09 14:52:40,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 198 transitions, 414 flow [2023-12-09 14:52:40,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 198 transitions, 414 flow [2023-12-09 14:52:40,499 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:40,500 INFO L362 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9a9c4ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:40,500 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 14:52:40,509 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:40,509 INFO L124 PetriNetUnfolderBase]: 9/130 cut-off events. [2023-12-09 14:52:40,509 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-09 14:52:40,510 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:40,510 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:40,510 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:40,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:40,510 INFO L85 PathProgramCache]: Analyzing trace with hash -900760062, now seen corresponding path program 1 times [2023-12-09 14:52:40,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:40,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959339457] [2023-12-09 14:52:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:40,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:40,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959339457] [2023-12-09 14:52:40,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959339457] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:40,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:40,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:40,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914184718] [2023-12-09 14:52:40,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:40,540 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:40,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:40,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:40,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:40,542 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 198 [2023-12-09 14:52:40,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 198 transitions, 414 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:40,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 198 [2023-12-09 14:52:40,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:40,697 INFO L124 PetriNetUnfolderBase]: 273/1364 cut-off events. [2023-12-09 14:52:40,698 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-12-09 14:52:40,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1873 conditions, 1364 events. 273/1364 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9922 event pairs, 220 based on Foata normal form. 407/1613 useless extension candidates. Maximal degree in co-relation 397. Up to 384 conditions per place. [2023-12-09 14:52:40,712 INFO L140 encePairwiseOnDemand]: 183/198 looper letters, 25 selfloop transitions, 2 changer transitions 0/182 dead transitions. [2023-12-09 14:52:40,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 182 transitions, 436 flow [2023-12-09 14:52:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-12-09 14:52:40,713 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8720538720538721 [2023-12-09 14:52:40,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-12-09 14:52:40,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-12-09 14:52:40,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:40,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-12-09 14:52:40,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,717 INFO L308 CegarLoopForPetriNet]: 181 programPoint places, -7 predicate places. [2023-12-09 14:52:40,717 INFO L500 AbstractCegarLoop]: Abstraction has has 174 places, 182 transitions, 436 flow [2023-12-09 14:52:40,717 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,717 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:40,717 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:40,717 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-09 14:52:40,718 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:40,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash -840300586, now seen corresponding path program 1 times [2023-12-09 14:52:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:40,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679394004] [2023-12-09 14:52:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:40,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:40,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679394004] [2023-12-09 14:52:40,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679394004] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:40,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827269672] [2023-12-09 14:52:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:40,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:40,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:40,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-09 14:52:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:40,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 14:52:40,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:40,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:52:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:40,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827269672] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:52:40,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:52:40,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 14:52:40,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054479130] [2023-12-09 14:52:40,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:52:40,904 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 14:52:40,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 14:52:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 14:52:40,906 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 198 [2023-12-09 14:52:40,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 182 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 160.4) internal successors, (1604), 10 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:40,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:40,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 198 [2023-12-09 14:52:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:41,124 INFO L124 PetriNetUnfolderBase]: 273/1374 cut-off events. [2023-12-09 14:52:41,124 INFO L125 PetriNetUnfolderBase]: For 341/499 co-relation queries the response was YES. [2023-12-09 14:52:41,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 1374 events. 273/1374 cut-off events. For 341/499 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9913 event pairs, 220 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 482. Up to 389 conditions per place. [2023-12-09 14:52:41,138 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 26 selfloop transitions, 9 changer transitions 0/189 dead transitions. [2023-12-09 14:52:41,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 189 transitions, 530 flow [2023-12-09 14:52:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 14:52:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 14:52:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1459 transitions. [2023-12-09 14:52:41,140 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8187429854096521 [2023-12-09 14:52:41,140 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1459 transitions. [2023-12-09 14:52:41,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1459 transitions. [2023-12-09 14:52:41,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:41,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1459 transitions. [2023-12-09 14:52:41,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.11111111111111) internal successors, (1459), 9 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:41,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:41,146 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:41,146 INFO L308 CegarLoopForPetriNet]: 181 programPoint places, 1 predicate places. [2023-12-09 14:52:41,146 INFO L500 AbstractCegarLoop]: Abstraction has has 182 places, 189 transitions, 530 flow [2023-12-09 14:52:41,147 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 160.4) internal successors, (1604), 10 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:41,147 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:41,147 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:41,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-09 14:52:41,351 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-09 14:52:41,352 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:41,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:41,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1135337342, now seen corresponding path program 2 times [2023-12-09 14:52:41,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:41,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078073671] [2023-12-09 14:52:41,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:41,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078073671] [2023-12-09 14:52:41,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078073671] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:41,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169184349] [2023-12-09 14:52:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-09 14:52:41,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:41,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:41,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-09 14:52:41,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-09 14:52:41,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-09 14:52:41,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-09 14:52:41,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:41,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:52:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-09 14:52:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169184349] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:52:41,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:52:41,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-12-09 14:52:41,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582243101] [2023-12-09 14:52:41,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:52:41,676 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-09 14:52:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-09 14:52:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-12-09 14:52:41,678 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 198 [2023-12-09 14:52:41,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 189 transitions, 530 flow. Second operand has 15 states, 15 states have (on average 160.6) internal successors, (2409), 15 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:41,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:41,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 198 [2023-12-09 14:52:41,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:42,011 INFO L124 PetriNetUnfolderBase]: 273/1398 cut-off events. [2023-12-09 14:52:42,012 INFO L125 PetriNetUnfolderBase]: For 637/953 co-relation queries the response was YES. [2023-12-09 14:52:42,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2746 conditions, 1398 events. 273/1398 cut-off events. For 637/953 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9918 event pairs, 220 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 618. Up to 401 conditions per place. [2023-12-09 14:52:42,028 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 32 selfloop transitions, 18 changer transitions 0/204 dead transitions. [2023-12-09 14:52:42,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 204 transitions, 714 flow [2023-12-09 14:52:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-09 14:52:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-09 14:52:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2897 transitions. [2023-12-09 14:52:42,033 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8128507295173962 [2023-12-09 14:52:42,033 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2897 transitions. [2023-12-09 14:52:42,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2897 transitions. [2023-12-09 14:52:42,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:42,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2897 transitions. [2023-12-09 14:52:42,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 160.94444444444446) internal successors, (2897), 18 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:42,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 198.0) internal successors, (3762), 19 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:42,044 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 198.0) internal successors, (3762), 19 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:42,045 INFO L308 CegarLoopForPetriNet]: 181 programPoint places, 18 predicate places. [2023-12-09 14:52:42,045 INFO L500 AbstractCegarLoop]: Abstraction has has 199 places, 204 transitions, 714 flow [2023-12-09 14:52:42,046 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 160.6) internal successors, (2409), 15 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:42,046 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:42,046 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:42,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-09 14:52:42,250 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:42,253 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:52:42,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1113944838, now seen corresponding path program 3 times [2023-12-09 14:52:42,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:42,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227089982] [2023-12-09 14:52:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:42,283 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:52:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:52:42,306 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:52:42,306 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:52:42,307 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-09 14:52:42,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-09 14:52:42,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-09 14:52:42,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-09 14:52:42,307 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-09 14:52:42,307 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-09 14:52:42,307 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1] [2023-12-09 14:52:42,308 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:52:42,308 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-09 14:52:42,333 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:52:42,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 249 transitions, 526 flow [2023-12-09 14:52:42,360 INFO L124 PetriNetUnfolderBase]: 35/299 cut-off events. [2023-12-09 14:52:42,360 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-12-09 14:52:42,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 299 events. 35/299 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 882 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 243. Up to 10 conditions per place. [2023-12-09 14:52:42,362 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 249 transitions, 526 flow [2023-12-09 14:52:42,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 249 transitions, 526 flow [2023-12-09 14:52:42,365 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:52:42,365 INFO L362 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9a9c4ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:52:42,366 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-09 14:52:42,375 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:52:42,376 INFO L124 PetriNetUnfolderBase]: 15/169 cut-off events. [2023-12-09 14:52:42,376 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-12-09 14:52:42,376 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:42,376 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1] [2023-12-09 14:52:42,376 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:52:42,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -273335370, now seen corresponding path program 1 times [2023-12-09 14:52:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:42,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089451780] [2023-12-09 14:52:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:52:42,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:42,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089451780] [2023-12-09 14:52:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089451780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:42,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:52:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:52:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209550903] [2023-12-09 14:52:42,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:42,412 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:52:42,413 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2023-12-09 14:52:42,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 249 transitions, 526 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:42,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:42,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2023-12-09 14:52:42,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:43,428 INFO L124 PetriNetUnfolderBase]: 1881/6518 cut-off events. [2023-12-09 14:52:43,429 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2023-12-09 14:52:43,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9778 conditions, 6518 events. 1881/6518 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 65559 event pairs, 1720 based on Foata normal form. 2608/8391 useless extension candidates. Maximal degree in co-relation 1859. Up to 2509 conditions per place. [2023-12-09 14:52:43,506 INFO L140 encePairwiseOnDemand]: 231/249 looper letters, 30 selfloop transitions, 2 changer transitions 0/229 dead transitions. [2023-12-09 14:52:43,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 229 transitions, 550 flow [2023-12-09 14:52:43,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 652 transitions. [2023-12-09 14:52:43,508 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8728246318607764 [2023-12-09 14:52:43,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 652 transitions. [2023-12-09 14:52:43,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 652 transitions. [2023-12-09 14:52:43,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:43,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 652 transitions. [2023-12-09 14:52:43,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:43,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:43,511 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:43,512 INFO L308 CegarLoopForPetriNet]: 227 programPoint places, -8 predicate places. [2023-12-09 14:52:43,512 INFO L500 AbstractCegarLoop]: Abstraction has has 219 places, 229 transitions, 550 flow [2023-12-09 14:52:43,512 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:43,512 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:43,512 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:43,512 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-09 14:52:43,512 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:52:43,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 173950986, now seen corresponding path program 1 times [2023-12-09 14:52:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:43,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011401638] [2023-12-09 14:52:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:43,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:52:43,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:43,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011401638] [2023-12-09 14:52:43,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011401638] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:43,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022948800] [2023-12-09 14:52:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:43,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:43,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:43,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:43,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-09 14:52:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:43,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-09 14:52:43,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-09 14:52:43,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-09 14:52:43,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022948800] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:43,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-09 14:52:43,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-09 14:52:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266818167] [2023-12-09 14:52:43,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:43,655 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:43,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-09 14:52:43,657 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 249 [2023-12-09 14:52:43,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 229 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:43,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:43,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 249 [2023-12-09 14:52:43,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:52:46,914 INFO L124 PetriNetUnfolderBase]: 10253/24048 cut-off events. [2023-12-09 14:52:46,914 INFO L125 PetriNetUnfolderBase]: For 13325/39935 co-relation queries the response was YES. [2023-12-09 14:52:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52293 conditions, 24048 events. 10253/24048 cut-off events. For 13325/39935 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 262691 event pairs, 5470 based on Foata normal form. 0/20985 useless extension candidates. Maximal degree in co-relation 8221. Up to 10633 conditions per place. [2023-12-09 14:52:47,259 INFO L140 encePairwiseOnDemand]: 244/249 looper letters, 56 selfloop transitions, 4 changer transitions 0/254 dead transitions. [2023-12-09 14:52:47,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 254 transitions, 779 flow [2023-12-09 14:52:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:52:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:52:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-12-09 14:52:47,261 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8647925033467202 [2023-12-09 14:52:47,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-12-09 14:52:47,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-12-09 14:52:47,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:52:47,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-12-09 14:52:47,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:47,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:47,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:47,275 INFO L308 CegarLoopForPetriNet]: 227 programPoint places, -6 predicate places. [2023-12-09 14:52:47,275 INFO L500 AbstractCegarLoop]: Abstraction has has 221 places, 254 transitions, 779 flow [2023-12-09 14:52:47,275 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:47,275 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:52:47,275 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:52:47,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-09 14:52:47,480 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:47,483 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:52:47,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:52:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1091991465, now seen corresponding path program 1 times [2023-12-09 14:52:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:52:47,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522269770] [2023-12-09 14:52:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:47,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:52:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:52:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:52:47,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522269770] [2023-12-09 14:52:47,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522269770] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:52:47,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089395160] [2023-12-09 14:52:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:52:47,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:52:47,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:52:47,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:52:47,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-09 14:52:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:52:47,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-09 14:52:47,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:52:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-09 14:52:47,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-09 14:52:47,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089395160] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:52:47,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-09 14:52:47,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-09 14:52:47,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879857775] [2023-12-09 14:52:47,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:52:47,619 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:52:47,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:52:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:52:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-09 14:52:47,620 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 249 [2023-12-09 14:52:47,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 254 transitions, 779 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:52:47,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:52:47,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 249 [2023-12-09 14:52:47,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:53:03,770 INFO L124 PetriNetUnfolderBase]: 85867/130984 cut-off events. [2023-12-09 14:53:03,770 INFO L125 PetriNetUnfolderBase]: For 105197/2011112 co-relation queries the response was YES. [2023-12-09 14:53:04,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378702 conditions, 130984 events. 85867/130984 cut-off events. For 105197/2011112 co-relation queries the response was YES. Maximal size of possible extension queue 5767. Compared 1133179 event pairs, 35078 based on Foata normal form. 2/104996 useless extension candidates. Maximal degree in co-relation 117245. Up to 79635 conditions per place. [2023-12-09 14:53:05,962 INFO L140 encePairwiseOnDemand]: 241/249 looper letters, 117 selfloop transitions, 11 changer transitions 0/309 dead transitions. [2023-12-09 14:53:05,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 309 transitions, 1339 flow [2023-12-09 14:53:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:53:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:53:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-12-09 14:53:05,964 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8393574297188755 [2023-12-09 14:53:05,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-12-09 14:53:05,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-12-09 14:53:05,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:53:05,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-12-09 14:53:05,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:05,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:05,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:05,968 INFO L308 CegarLoopForPetriNet]: 227 programPoint places, -4 predicate places. [2023-12-09 14:53:05,968 INFO L500 AbstractCegarLoop]: Abstraction has has 223 places, 309 transitions, 1339 flow [2023-12-09 14:53:05,968 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:05,968 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:05,968 INFO L233 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:53:05,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-09 14:53:06,173 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-09 14:53:06,174 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:53:06,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:06,175 INFO L85 PathProgramCache]: Analyzing trace with hash 584967081, now seen corresponding path program 1 times [2023-12-09 14:53:06,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:06,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198384588] [2023-12-09 14:53:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:06,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:53:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-09 14:53:06,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:53:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198384588] [2023-12-09 14:53:06,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198384588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:53:06,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86277120] [2023-12-09 14:53:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:06,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:53:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:53:06,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:53:06,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-09 14:53:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:53:06,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-09 14:53:06,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:53:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-09 14:53:06,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:53:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-09 14:53:06,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86277120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:53:06,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:53:06,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-09 14:53:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888448378] [2023-12-09 14:53:06,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:53:06,382 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-09 14:53:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:53:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-09 14:53:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-09 14:53:06,384 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 249 [2023-12-09 14:53:06,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 309 transitions, 1339 flow. Second operand has 10 states, 10 states have (on average 202.5) internal successors, (2025), 10 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:06,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:53:06,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 249 [2023-12-09 14:53:06,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:53:24,305 INFO L124 PetriNetUnfolderBase]: 85867/130994 cut-off events. [2023-12-09 14:53:24,305 INFO L125 PetriNetUnfolderBase]: For 193629/3205892 co-relation queries the response was YES. [2023-12-09 14:53:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429282 conditions, 130994 events. 85867/130994 cut-off events. For 193629/3205892 co-relation queries the response was YES. Maximal size of possible extension queue 5767. Compared 1133742 event pairs, 35078 based on Foata normal form. 2/105006 useless extension candidates. Maximal degree in co-relation 132225. Up to 79635 conditions per place. [2023-12-09 14:53:27,304 INFO L140 encePairwiseOnDemand]: 243/249 looper letters, 86 selfloop transitions, 9 changer transitions 0/316 dead transitions. [2023-12-09 14:53:27,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 316 transitions, 1553 flow [2023-12-09 14:53:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-09 14:53:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-09 14:53:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1842 transitions. [2023-12-09 14:53:27,326 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.821954484605087 [2023-12-09 14:53:27,326 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1842 transitions. [2023-12-09 14:53:27,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1842 transitions. [2023-12-09 14:53:27,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:53:27,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1842 transitions. [2023-12-09 14:53:27,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 204.66666666666666) internal successors, (1842), 9 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:27,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:27,333 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 249.0) internal successors, (2490), 10 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:27,334 INFO L308 CegarLoopForPetriNet]: 227 programPoint places, 4 predicate places. [2023-12-09 14:53:27,334 INFO L500 AbstractCegarLoop]: Abstraction has has 231 places, 316 transitions, 1553 flow [2023-12-09 14:53:27,334 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 202.5) internal successors, (2025), 10 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:27,334 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:27,335 INFO L233 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:53:27,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-09 14:53:27,542 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-09 14:53:27,543 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:53:27,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1870830079, now seen corresponding path program 2 times [2023-12-09 14:53:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921362660] [2023-12-09 14:53:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:27,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:53:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-09 14:53:27,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:53:27,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921362660] [2023-12-09 14:53:27,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921362660] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:53:27,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661073706] [2023-12-09 14:53:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-09 14:53:27,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:53:27,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:53:27,709 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:53:27,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-09 14:53:27,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-09 14:53:27,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-09 14:53:27,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-09 14:53:27,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:53:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-09 14:53:27,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-09 14:53:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-09 14:53:28,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661073706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-09 14:53:28,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-09 14:53:28,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-12-09 14:53:28,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293966922] [2023-12-09 14:53:28,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-09 14:53:28,029 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-09 14:53:28,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:53:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-09 14:53:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-12-09 14:53:28,031 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 249 [2023-12-09 14:53:28,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 316 transitions, 1553 flow. Second operand has 15 states, 15 states have (on average 202.66666666666666) internal successors, (3040), 15 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:28,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:53:28,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 249 [2023-12-09 14:53:28,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:53:50,599 INFO L124 PetriNetUnfolderBase]: 85872/131023 cut-off events. [2023-12-09 14:53:50,599 INFO L125 PetriNetUnfolderBase]: For 313921/4246380 co-relation queries the response was YES. [2023-12-09 14:53:51,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479949 conditions, 131023 events. 85872/131023 cut-off events. For 313921/4246380 co-relation queries the response was YES. Maximal size of possible extension queue 5767. Compared 1134300 event pairs, 35083 based on Foata normal form. 2/105035 useless extension candidates. Maximal degree in co-relation 147205. Up to 79640 conditions per place. [2023-12-09 14:53:53,475 INFO L140 encePairwiseOnDemand]: 243/249 looper letters, 92 selfloop transitions, 18 changer transitions 0/331 dead transitions. [2023-12-09 14:53:53,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 331 transitions, 1857 flow [2023-12-09 14:53:53,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-09 14:53:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-09 14:53:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3658 transitions. [2023-12-09 14:53:53,496 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8161535029004908 [2023-12-09 14:53:53,497 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3658 transitions. [2023-12-09 14:53:53,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3658 transitions. [2023-12-09 14:53:53,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:53:53,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3658 transitions. [2023-12-09 14:53:53,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 203.22222222222223) internal successors, (3658), 18 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:53,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:53,506 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:53,506 INFO L308 CegarLoopForPetriNet]: 227 programPoint places, 21 predicate places. [2023-12-09 14:53:53,506 INFO L500 AbstractCegarLoop]: Abstraction has has 248 places, 331 transitions, 1857 flow [2023-12-09 14:53:53,507 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 202.66666666666666) internal successors, (3040), 15 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:53,507 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:53,507 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:53:53,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-09 14:53:53,707 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-09 14:53:53,708 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:53:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 494354309, now seen corresponding path program 3 times [2023-12-09 14:53:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:53,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114965772] [2023-12-09 14:53:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:53:53,749 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:53:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:53:53,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:53:53,795 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:53:53,795 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-09 14:53:53,795 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-09 14:53:53,795 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-09 14:53:53,796 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-09 14:53:53,796 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-09 14:53:53,796 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-09 14:53:53,796 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-09 14:53:53,796 INFO L457 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-12-09 14:53:53,796 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:53:53,796 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-09 14:53:53,849 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:53:53,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 300 transitions, 640 flow [2023-12-09 14:53:53,932 INFO L124 PetriNetUnfolderBase]: 43/363 cut-off events. [2023-12-09 14:53:53,932 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-12-09 14:53:53,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 363 events. 43/363 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1161 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 312. Up to 12 conditions per place. [2023-12-09 14:53:53,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 300 transitions, 640 flow [2023-12-09 14:53:53,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 300 transitions, 640 flow [2023-12-09 14:53:53,939 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:53:53,940 INFO L362 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9a9c4ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:53:53,940 INFO L363 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-09 14:53:53,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:53:53,966 INFO L124 PetriNetUnfolderBase]: 14/163 cut-off events. [2023-12-09 14:53:53,966 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-12-09 14:53:53,966 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:53:53,966 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1] [2023-12-09 14:53:53,966 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:53:53,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:53:53,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2013802898, now seen corresponding path program 1 times [2023-12-09 14:53:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:53:53,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453210888] [2023-12-09 14:53:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:53:53,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:53:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:53:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:53:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:53:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453210888] [2023-12-09 14:53:54,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453210888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:53:54,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:53:54,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-09 14:53:54,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740904690] [2023-12-09 14:53:54,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:53:54,018 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:53:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:53:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:53:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:53:54,019 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 300 [2023-12-09 14:53:54,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 300 transitions, 640 flow. Second operand has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:53:54,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:53:54,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 300 [2023-12-09 14:53:54,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:53:59,736 INFO L124 PetriNetUnfolderBase]: 12349/34239 cut-off events. [2023-12-09 14:53:59,736 INFO L125 PetriNetUnfolderBase]: For 11961/11961 co-relation queries the response was YES. [2023-12-09 14:54:00,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54375 conditions, 34239 events. 12349/34239 cut-off events. For 11961/11961 co-relation queries the response was YES. Maximal size of possible extension queue 1237. Compared 416669 event pairs, 11720 based on Foata normal form. 15598/46256 useless extension candidates. Maximal degree in co-relation 9881. Up to 15634 conditions per place. [2023-12-09 14:54:00,358 INFO L140 encePairwiseOnDemand]: 279/300 looper letters, 35 selfloop transitions, 2 changer transitions 0/276 dead transitions. [2023-12-09 14:54:00,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 276 transitions, 666 flow [2023-12-09 14:54:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:54:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:54:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2023-12-09 14:54:00,362 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2023-12-09 14:54:00,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2023-12-09 14:54:00,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2023-12-09 14:54:00,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:54:00,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2023-12-09 14:54:00,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:54:00,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:54:00,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 300.0) internal successors, (1200), 4 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:54:00,392 INFO L308 CegarLoopForPetriNet]: 273 programPoint places, -9 predicate places. [2023-12-09 14:54:00,393 INFO L500 AbstractCegarLoop]: Abstraction has has 264 places, 276 transitions, 666 flow [2023-12-09 14:54:00,393 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:54:00,393 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:54:00,393 INFO L233 CegarLoopForPetriNet]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:54:00,393 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-09 14:54:00,393 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:54:00,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:54:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1459524582, now seen corresponding path program 1 times [2023-12-09 14:54:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:54:00,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541248396] [2023-12-09 14:54:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:54:00,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:54:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:54:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:54:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:54:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541248396] [2023-12-09 14:54:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541248396] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-09 14:54:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608674790] [2023-12-09 14:54:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:54:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-09 14:54:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:54:00,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-09 14:54:00,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-09 14:54:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:54:00,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-09 14:54:00,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-09 14:54:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-09 14:54:00,638 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-09 14:54:00,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608674790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:54:00,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-09 14:54:00,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-09 14:54:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005149552] [2023-12-09 14:54:00,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:54:00,639 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:54:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:54:00,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:54:00,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-09 14:54:00,640 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 300 [2023-12-09 14:54:00,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 276 transitions, 666 flow. Second operand has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:54:00,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:54:00,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 300 [2023-12-09 14:54:00,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand