/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:50:29,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:50:29,502 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-VariableLbe.epf [2023-08-27 14:50:29,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:50:29,506 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:50:29,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:50:29,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:50:29,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:50:29,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:50:29,532 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:50:29,532 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:50:29,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:50:29,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:50:29,533 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:50:29,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:50:29,534 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:50:29,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:50:29,534 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:50:29,534 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:50:29,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:50:29,534 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:50:29,535 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:50:29,535 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:50:29,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:50:29,536 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:50:29,536 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:50:29,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:50:29,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:50:29,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:50:29,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:50:29,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:50:29,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:50:29,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:50:29,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:50:29,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:50:29,542 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:50:29,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:50:29,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:50:29,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:50:29,779 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:50:29,780 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:50:29,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-27 14:50:30,719 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:50:30,883 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:50:30,883 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-27 14:50:30,889 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731ac2d6a/db6e155bf2f840cb9fc01632a3510cc6/FLAG0601e39f9 [2023-08-27 14:50:30,901 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/731ac2d6a/db6e155bf2f840cb9fc01632a3510cc6 [2023-08-27 14:50:30,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:50:30,905 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:50:30,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:50:30,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:50:30,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:50:30,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:50:30" (1/1) ... [2023-08-27 14:50:30,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2703a97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:30, skipping insertion in model container [2023-08-27 14:50:30,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:50:30" (1/1) ... [2023-08-27 14:50:30,927 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:50:31,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:50:31,040 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:50:31,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:50:31,078 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:50:31,078 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:50:31,084 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:50:31,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31 WrapperNode [2023-08-27 14:50:31,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:50:31,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:50:31,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:50:31,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:50:31,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,123 INFO L138 Inliner]: procedures = 23, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 123 [2023-08-27 14:50:31,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:50:31,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:50:31,125 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:50:31,125 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:50:31,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,149 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,150 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,151 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,152 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:50:31,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:50:31,153 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:50:31,153 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:50:31,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (1/1) ... [2023-08-27 14:50:31,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:50:31,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:31,175 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) [2023-08-27 14:50:31,182 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 [2023-08-27 14:50:31,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:50:31,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:50:31,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:50:31,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:50:31,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:50:31,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-27 14:50:31,202 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:50:31,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:50:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:50:31,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:50:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:50:31,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:50:31,204 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 14:50:31,296 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:50:31,298 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:50:31,454 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:50:31,479 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:50:31,479 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 14:50:31,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:50:31 BoogieIcfgContainer [2023-08-27 14:50:31,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:50:31,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:50:31,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:50:31,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:50:31,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:50:30" (1/3) ... [2023-08-27 14:50:31,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4ed39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:50:31, skipping insertion in model container [2023-08-27 14:50:31,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:50:31" (2/3) ... [2023-08-27 14:50:31,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a4ed39a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:50:31, skipping insertion in model container [2023-08-27 14:50:31,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:50:31" (3/3) ... [2023-08-27 14:50:31,486 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-08-27 14:50:31,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:50:31,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 14:50:31,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:50:31,569 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 14:50:31,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 133 transitions, 298 flow [2023-08-27 14:50:31,640 INFO L124 PetriNetUnfolderBase]: 10/129 cut-off events. [2023-08-27 14:50:31,640 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:50:31,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 129 events. 10/129 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 110 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-27 14:50:31,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 133 transitions, 298 flow [2023-08-27 14:50:31,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 116 transitions, 256 flow [2023-08-27 14:50:31,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:50:31,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 116 transitions, 256 flow [2023-08-27 14:50:31,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 116 transitions, 256 flow [2023-08-27 14:50:31,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 116 transitions, 256 flow [2023-08-27 14:50:31,700 INFO L124 PetriNetUnfolderBase]: 10/116 cut-off events. [2023-08-27 14:50:31,701 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:50:31,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 116 events. 10/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-27 14:50:31,703 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2023-08-27 14:50:34,111 INFO L134 LiptonReduction]: Checked pairs total: 2847 [2023-08-27 14:50:34,111 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-27 14:50:34,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:50:34,124 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@127576a2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:50:34,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-27 14:50:34,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:50:34,133 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-08-27 14:50:34,133 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 14:50:34,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:34,133 INFO L208 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] [2023-08-27 14:50:34,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:34,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1471935645, now seen corresponding path program 1 times [2023-08-27 14:50:34,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:34,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010237665] [2023-08-27 14:50:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:34,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010237665] [2023-08-27 14:50:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010237665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:34,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:50:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952051022] [2023-08-27 14:50:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:34,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:50:34,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:34,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:50:34,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:50:34,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 230 [2023-08-27 14:50:34,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 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) [2023-08-27 14:50:34,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:34,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 230 [2023-08-27 14:50:34,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:34,771 INFO L124 PetriNetUnfolderBase]: 1343/1736 cut-off events. [2023-08-27 14:50:34,771 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-27 14:50:34,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5915 event pairs, 215 based on Foata normal form. 1/1047 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-08-27 14:50:34,784 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-08-27 14:50:34,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-08-27 14:50:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:50:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:50:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2023-08-27 14:50:34,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565217391304348 [2023-08-27 14:50:34,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2023-08-27 14:50:34,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2023-08-27 14:50:34,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:34,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2023-08-27 14:50:34,808 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) [2023-08-27 14:50:34,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:34,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:34,813 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 384 transitions. [2023-08-27 14:50:34,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-08-27 14:50:34,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 14:50:34,818 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-08-27 14:50:34,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-27 14:50:34,822 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-27 14:50:34,822 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-08-27 14:50:34,822 INFO L496 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) [2023-08-27 14:50:34,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:34,823 INFO L208 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] [2023-08-27 14:50:34,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:50:34,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:34,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:34,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1614624580, now seen corresponding path program 1 times [2023-08-27 14:50:34,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:34,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754644897] [2023-08-27 14:50:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:35,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:35,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754644897] [2023-08-27 14:50:35,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754644897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:35,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:35,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:35,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324394003] [2023-08-27 14:50:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:35,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-27 14:50:35,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:35,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-27 14:50:35,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:35,242 INFO L124 PetriNetUnfolderBase]: 1863/2558 cut-off events. [2023-08-27 14:50:35,242 INFO L125 PetriNetUnfolderBase]: For 746/746 co-relation queries the response was YES. [2023-08-27 14:50:35,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 2558 events. 1863/2558 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10772 event pairs, 370 based on Foata normal form. 242/2746 useless extension candidates. Maximal degree in co-relation 2481. Up to 1349 conditions per place. [2023-08-27 14:50:35,253 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 65 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2023-08-27 14:50:35,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 74 transitions, 346 flow [2023-08-27 14:50:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-08-27 14:50:35,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49043478260869566 [2023-08-27 14:50:35,257 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-08-27 14:50:35,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-08-27 14:50:35,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:35,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-08-27 14:50:35,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,260 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 564 transitions. [2023-08-27 14:50:35,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 74 transitions, 346 flow [2023-08-27 14:50:35,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:35,263 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 142 flow [2023-08-27 14:50:35,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-27 14:50:35,264 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-27 14:50:35,266 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 142 flow [2023-08-27 14:50:35,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:35,267 INFO L208 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] [2023-08-27 14:50:35,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 14:50:35,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:35,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 710139962, now seen corresponding path program 2 times [2023-08-27 14:50:35,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859832620] [2023-08-27 14:50:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859832620] [2023-08-27 14:50:35,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859832620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:35,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:35,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:35,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446713104] [2023-08-27 14:50:35,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:35,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:50:35,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:50:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:50:35,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-08-27 14:50:35,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:35,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-08-27 14:50:35,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:35,605 INFO L124 PetriNetUnfolderBase]: 1723/2398 cut-off events. [2023-08-27 14:50:35,605 INFO L125 PetriNetUnfolderBase]: For 3271/3619 co-relation queries the response was YES. [2023-08-27 14:50:35,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7647 conditions, 2398 events. 1723/2398 cut-off events. For 3271/3619 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10542 event pairs, 441 based on Foata normal form. 423/2779 useless extension candidates. Maximal degree in co-relation 1740. Up to 1550 conditions per place. [2023-08-27 14:50:35,614 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 55 selfloop transitions, 4 changer transitions 8/71 dead transitions. [2023-08-27 14:50:35,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 403 flow [2023-08-27 14:50:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:50:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:50:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-27 14:50:35,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2023-08-27 14:50:35,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-27 14:50:35,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-27 14:50:35,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:35,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-27 14:50:35,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,619 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,619 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 142 flow. Second operand 4 states and 470 transitions. [2023-08-27 14:50:35,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 403 flow [2023-08-27 14:50:35,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 71 transitions, 396 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:35,623 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 168 flow [2023-08-27 14:50:35,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-27 14:50:35,624 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-27 14:50:35,624 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 168 flow [2023-08-27 14:50:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:35,625 INFO L208 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] [2023-08-27 14:50:35,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 14:50:35,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:35,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1992025534, now seen corresponding path program 3 times [2023-08-27 14:50:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:35,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297950495] [2023-08-27 14:50:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:35,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:35,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297950495] [2023-08-27 14:50:35,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297950495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:35,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:35,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:35,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521938970] [2023-08-27 14:50:35,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:35,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:35,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:35,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:35,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-27 14:50:35,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:35,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-27 14:50:35,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:35,975 INFO L124 PetriNetUnfolderBase]: 2285/3235 cut-off events. [2023-08-27 14:50:35,975 INFO L125 PetriNetUnfolderBase]: For 6478/6843 co-relation queries the response was YES. [2023-08-27 14:50:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10718 conditions, 3235 events. 2285/3235 cut-off events. For 6478/6843 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15333 event pairs, 715 based on Foata normal form. 489/3665 useless extension candidates. Maximal degree in co-relation 4514. Up to 1763 conditions per place. [2023-08-27 14:50:35,990 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 63 selfloop transitions, 6 changer transitions 12/83 dead transitions. [2023-08-27 14:50:35,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 83 transitions, 516 flow [2023-08-27 14:50:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-27 14:50:35,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852173913043478 [2023-08-27 14:50:35,992 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-27 14:50:35,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-27 14:50:35,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:35,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-27 14:50:35,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,995 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:35,995 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 168 flow. Second operand 5 states and 558 transitions. [2023-08-27 14:50:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 83 transitions, 516 flow [2023-08-27 14:50:36,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 511 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:36,003 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 221 flow [2023-08-27 14:50:36,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-27 14:50:36,004 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-27 14:50:36,004 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 221 flow [2023-08-27 14:50:36,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:36,005 INFO L208 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] [2023-08-27 14:50:36,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 14:50:36,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:36,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2106439313, now seen corresponding path program 1 times [2023-08-27 14:50:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:36,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234563923] [2023-08-27 14:50:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:36,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:36,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234563923] [2023-08-27 14:50:36,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234563923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:36,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:36,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 14:50:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582507650] [2023-08-27 14:50:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:50:36,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:50:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:50:36,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-27 14:50:36,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:36,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-27 14:50:36,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:36,475 INFO L124 PetriNetUnfolderBase]: 2738/3898 cut-off events. [2023-08-27 14:50:36,475 INFO L125 PetriNetUnfolderBase]: For 12606/13056 co-relation queries the response was YES. [2023-08-27 14:50:36,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14943 conditions, 3898 events. 2738/3898 cut-off events. For 12606/13056 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19375 event pairs, 1040 based on Foata normal form. 621/4466 useless extension candidates. Maximal degree in co-relation 5263. Up to 2692 conditions per place. [2023-08-27 14:50:36,495 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 65 selfloop transitions, 6 changer transitions 17/90 dead transitions. [2023-08-27 14:50:36,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 90 transitions, 617 flow [2023-08-27 14:50:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:50:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:50:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 566 transitions. [2023-08-27 14:50:36,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49217391304347824 [2023-08-27 14:50:36,497 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 566 transitions. [2023-08-27 14:50:36,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 566 transitions. [2023-08-27 14:50:36,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:36,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 566 transitions. [2023-08-27 14:50:36,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,500 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,500 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 221 flow. Second operand 5 states and 566 transitions. [2023-08-27 14:50:36,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 90 transitions, 617 flow [2023-08-27 14:50:36,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 90 transitions, 585 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-27 14:50:36,509 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 256 flow [2023-08-27 14:50:36,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-27 14:50:36,510 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-08-27 14:50:36,510 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 256 flow [2023-08-27 14:50:36,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:36,510 INFO L208 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] [2023-08-27 14:50:36,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 14:50:36,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:36,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash -798349492, now seen corresponding path program 4 times [2023-08-27 14:50:36,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:36,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342917427] [2023-08-27 14:50:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:36,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:36,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:36,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342917427] [2023-08-27 14:50:36,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342917427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:36,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:36,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042729174] [2023-08-27 14:50:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:50:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:50:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:50:36,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-08-27 14:50:36,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:36,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-08-27 14:50:36,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:36,932 INFO L124 PetriNetUnfolderBase]: 3227/4722 cut-off events. [2023-08-27 14:50:36,932 INFO L125 PetriNetUnfolderBase]: For 23651/25179 co-relation queries the response was YES. [2023-08-27 14:50:36,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18251 conditions, 4722 events. 3227/4722 cut-off events. For 23651/25179 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 25308 event pairs, 1411 based on Foata normal form. 1399/5995 useless extension candidates. Maximal degree in co-relation 10169. Up to 2946 conditions per place. [2023-08-27 14:50:36,952 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 74 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-27 14:50:36,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 667 flow [2023-08-27 14:50:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:50:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:50:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-27 14:50:36,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043478260869565 [2023-08-27 14:50:36,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-27 14:50:36,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-27 14:50:36,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:36,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-27 14:50:36,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,956 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 256 flow. Second operand 4 states and 464 transitions. [2023-08-27 14:50:36,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 667 flow [2023-08-27 14:50:36,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 643 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-27 14:50:36,961 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 290 flow [2023-08-27 14:50:36,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-27 14:50:36,961 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-27 14:50:36,962 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 290 flow [2023-08-27 14:50:36,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:36,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:36,962 INFO L208 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] [2023-08-27 14:50:36,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 14:50:36,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:36,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash -81979142, now seen corresponding path program 5 times [2023-08-27 14:50:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:36,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984568447] [2023-08-27 14:50:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:36,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:37,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:37,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984568447] [2023-08-27 14:50:37,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984568447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:37,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216490043] [2023-08-27 14:50:37,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:37,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:50:37,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:50:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:50:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-08-27 14:50:37,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:37,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-08-27 14:50:37,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:37,375 INFO L124 PetriNetUnfolderBase]: 3733/5457 cut-off events. [2023-08-27 14:50:37,376 INFO L125 PetriNetUnfolderBase]: For 27019/28450 co-relation queries the response was YES. [2023-08-27 14:50:37,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23918 conditions, 5457 events. 3733/5457 cut-off events. For 27019/28450 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 28935 event pairs, 1733 based on Foata normal form. 1380/6706 useless extension candidates. Maximal degree in co-relation 12795. Up to 4054 conditions per place. [2023-08-27 14:50:37,402 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 60 selfloop transitions, 4 changer transitions 15/84 dead transitions. [2023-08-27 14:50:37,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 683 flow [2023-08-27 14:50:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:50:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:50:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-27 14:50:37,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2023-08-27 14:50:37,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-27 14:50:37,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-27 14:50:37,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:37,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-27 14:50:37,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,406 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,406 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 290 flow. Second operand 4 states and 470 transitions. [2023-08-27 14:50:37,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 683 flow [2023-08-27 14:50:37,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 676 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:37,414 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 320 flow [2023-08-27 14:50:37,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-27 14:50:37,414 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-27 14:50:37,414 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 320 flow [2023-08-27 14:50:37,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:37,415 INFO L208 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] [2023-08-27 14:50:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 14:50:37,415 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:37,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash -757225262, now seen corresponding path program 6 times [2023-08-27 14:50:37,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:37,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107143023] [2023-08-27 14:50:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:37,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107143023] [2023-08-27 14:50:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107143023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:50:37,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:50:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 14:50:37,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137453374] [2023-08-27 14:50:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:50:37,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:50:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:50:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:50:37,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 230 [2023-08-27 14:50:37,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:37,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 230 [2023-08-27 14:50:37,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:37,868 INFO L124 PetriNetUnfolderBase]: 3811/5437 cut-off events. [2023-08-27 14:50:37,868 INFO L125 PetriNetUnfolderBase]: For 37663/39214 co-relation queries the response was YES. [2023-08-27 14:50:37,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26037 conditions, 5437 events. 3811/5437 cut-off events. For 37663/39214 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 28021 event pairs, 1570 based on Foata normal form. 1399/6648 useless extension candidates. Maximal degree in co-relation 14114. Up to 3160 conditions per place. [2023-08-27 14:50:37,893 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 61 selfloop transitions, 14 changer transitions 9/88 dead transitions. [2023-08-27 14:50:37,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 824 flow [2023-08-27 14:50:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:50:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:50:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-27 14:50:37,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043478260869565 [2023-08-27 14:50:37,895 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-27 14:50:37,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-27 14:50:37,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:37,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-27 14:50:37,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,897 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,897 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 320 flow. Second operand 4 states and 464 transitions. [2023-08-27 14:50:37,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 824 flow [2023-08-27 14:50:37,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 820 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:37,906 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 486 flow [2023-08-27 14:50:37,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-08-27 14:50:37,906 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2023-08-27 14:50:37,906 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 486 flow [2023-08-27 14:50:37,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:37,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:37,907 INFO L208 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] [2023-08-27 14:50:37,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 14:50:37,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:37,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:37,907 INFO L85 PathProgramCache]: Analyzing trace with hash 290934119, now seen corresponding path program 1 times [2023-08-27 14:50:37,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:37,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005490213] [2023-08-27 14:50:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:37,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:37,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005490213] [2023-08-27 14:50:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005490213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540920826] [2023-08-27 14:50:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:38,043 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) [2023-08-27 14:50:38,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 14:50:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:38,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:50:38,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:38,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:38,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540920826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:38,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 14:50:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132278812] [2023-08-27 14:50:38,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:38,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:50:38,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:38,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:50:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-27 14:50:38,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 230 [2023-08-27 14:50:38,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 486 flow. Second operand has 11 states, 11 states have (on average 98.18181818181819) internal successors, (1080), 11 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:38,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:38,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 230 [2023-08-27 14:50:38,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:38,979 INFO L124 PetriNetUnfolderBase]: 4594/6141 cut-off events. [2023-08-27 14:50:38,979 INFO L125 PetriNetUnfolderBase]: For 59531/60065 co-relation queries the response was YES. [2023-08-27 14:50:38,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36031 conditions, 6141 events. 4594/6141 cut-off events. For 59531/60065 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26325 event pairs, 931 based on Foata normal form. 990/7121 useless extension candidates. Maximal degree in co-relation 16702. Up to 3080 conditions per place. [2023-08-27 14:50:39,013 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 134 selfloop transitions, 37 changer transitions 14/187 dead transitions. [2023-08-27 14:50:39,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 187 transitions, 2012 flow [2023-08-27 14:50:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 14:50:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 14:50:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1173 transitions. [2023-08-27 14:50:39,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2023-08-27 14:50:39,016 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1173 transitions. [2023-08-27 14:50:39,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1173 transitions. [2023-08-27 14:50:39,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:39,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1173 transitions. [2023-08-27 14:50:39,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.63636363636364) internal successors, (1173), 11 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:39,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:39,021 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:39,021 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 486 flow. Second operand 11 states and 1173 transitions. [2023-08-27 14:50:39,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 187 transitions, 2012 flow [2023-08-27 14:50:39,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 187 transitions, 1870 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-08-27 14:50:39,045 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 886 flow [2023-08-27 14:50:39,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=886, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-08-27 14:50:39,046 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2023-08-27 14:50:39,046 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 886 flow [2023-08-27 14:50:39,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 98.18181818181819) internal successors, (1080), 11 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:39,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:39,046 INFO L208 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] [2023-08-27 14:50:39,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 14:50:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:39,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:39,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:39,251 INFO L85 PathProgramCache]: Analyzing trace with hash 571879989, now seen corresponding path program 1 times [2023-08-27 14:50:39,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:39,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341252395] [2023-08-27 14:50:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:50:39,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341252395] [2023-08-27 14:50:39,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341252395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137369308] [2023-08-27 14:50:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:39,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:39,349 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) [2023-08-27 14:50:39,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 14:50:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:39,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:50:39,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:50:39,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:50:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137369308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:39,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:39,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-27 14:50:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050779130] [2023-08-27 14:50:39,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:39,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:50:39,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:50:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:50:39,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-27 14:50:39,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 886 flow. Second operand has 8 states, 8 states have (on average 102.375) internal successors, (819), 8 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:39,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:39,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-27 14:50:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:40,052 INFO L124 PetriNetUnfolderBase]: 4858/6324 cut-off events. [2023-08-27 14:50:40,052 INFO L125 PetriNetUnfolderBase]: For 80837/81680 co-relation queries the response was YES. [2023-08-27 14:50:40,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40843 conditions, 6324 events. 4858/6324 cut-off events. For 80837/81680 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25726 event pairs, 1082 based on Foata normal form. 859/7160 useless extension candidates. Maximal degree in co-relation 33811. Up to 3798 conditions per place. [2023-08-27 14:50:40,085 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 100 selfloop transitions, 70 changer transitions 1/177 dead transitions. [2023-08-27 14:50:40,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 177 transitions, 2572 flow [2023-08-27 14:50:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:50:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:50:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 663 transitions. [2023-08-27 14:50:40,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48043478260869565 [2023-08-27 14:50:40,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 663 transitions. [2023-08-27 14:50:40,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 663 transitions. [2023-08-27 14:50:40,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:40,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 663 transitions. [2023-08-27 14:50:40,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:40,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:40,090 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:40,090 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 886 flow. Second operand 6 states and 663 transitions. [2023-08-27 14:50:40,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 177 transitions, 2572 flow [2023-08-27 14:50:40,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 177 transitions, 2133 flow, removed 144 selfloop flow, removed 6 redundant places. [2023-08-27 14:50:40,154 INFO L231 Difference]: Finished difference. Result has 75 places, 130 transitions, 1772 flow [2023-08-27 14:50:40,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1772, PETRI_PLACES=75, PETRI_TRANSITIONS=130} [2023-08-27 14:50:40,155 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 37 predicate places. [2023-08-27 14:50:40,155 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 130 transitions, 1772 flow [2023-08-27 14:50:40,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.375) internal successors, (819), 8 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:40,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:40,156 INFO L208 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] [2023-08-27 14:50:40,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 14:50:40,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 14:50:40,361 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:40,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1885196781, now seen corresponding path program 1 times [2023-08-27 14:50:40,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:40,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680435364] [2023-08-27 14:50:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:50:40,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:40,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680435364] [2023-08-27 14:50:40,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680435364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:40,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999088747] [2023-08-27 14:50:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:40,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:40,488 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) [2023-08-27 14:50:40,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 14:50:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:40,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 14:50:40,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:40,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:40,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999088747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:40,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:40,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-27 14:50:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544534177] [2023-08-27 14:50:40,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:40,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:50:40,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:50:40,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:50:40,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 230 [2023-08-27 14:50:40,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 130 transitions, 1772 flow. Second operand has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:40,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:40,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 230 [2023-08-27 14:50:40,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:41,789 INFO L124 PetriNetUnfolderBase]: 8971/11971 cut-off events. [2023-08-27 14:50:41,789 INFO L125 PetriNetUnfolderBase]: For 174374/178381 co-relation queries the response was YES. [2023-08-27 14:50:41,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80712 conditions, 11971 events. 8971/11971 cut-off events. For 174374/178381 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 58439 event pairs, 1092 based on Foata normal form. 2705/14005 useless extension candidates. Maximal degree in co-relation 72391. Up to 7109 conditions per place. [2023-08-27 14:50:41,874 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 123 selfloop transitions, 103 changer transitions 3/247 dead transitions. [2023-08-27 14:50:41,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 247 transitions, 3725 flow [2023-08-27 14:50:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:50:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:50:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 507 transitions. [2023-08-27 14:50:41,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510869565217391 [2023-08-27 14:50:41,875 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 507 transitions. [2023-08-27 14:50:41,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 507 transitions. [2023-08-27 14:50:41,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:41,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 507 transitions. [2023-08-27 14:50:41,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.75) internal successors, (507), 4 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:41,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:41,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:41,878 INFO L175 Difference]: Start difference. First operand has 75 places, 130 transitions, 1772 flow. Second operand 4 states and 507 transitions. [2023-08-27 14:50:41,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 247 transitions, 3725 flow [2023-08-27 14:50:42,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 247 transitions, 3408 flow, removed 138 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:42,197 INFO L231 Difference]: Finished difference. Result has 79 places, 210 transitions, 3377 flow [2023-08-27 14:50:42,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3377, PETRI_PLACES=79, PETRI_TRANSITIONS=210} [2023-08-27 14:50:42,198 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-08-27 14:50:42,198 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 210 transitions, 3377 flow [2023-08-27 14:50:42,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:42,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:42,199 INFO L208 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] [2023-08-27 14:50:42,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 14:50:42,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:42,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:42,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:42,404 INFO L85 PathProgramCache]: Analyzing trace with hash -483644947, now seen corresponding path program 2 times [2023-08-27 14:50:42,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:42,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244761665] [2023-08-27 14:50:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:42,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244761665] [2023-08-27 14:50:42,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244761665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250795595] [2023-08-27 14:50:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:50:42,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:42,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:42,550 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) [2023-08-27 14:50:42,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 14:50:42,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:50:42,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:50:42,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 14:50:42,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:42,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:50:42,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250795595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:42,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:42,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-08-27 14:50:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407467780] [2023-08-27 14:50:42,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:50:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:50:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:50:42,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2023-08-27 14:50:42,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 210 transitions, 3377 flow. Second operand has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:42,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:42,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2023-08-27 14:50:42,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:45,837 INFO L124 PetriNetUnfolderBase]: 20833/27897 cut-off events. [2023-08-27 14:50:45,837 INFO L125 PetriNetUnfolderBase]: For 436193/443308 co-relation queries the response was YES. [2023-08-27 14:50:45,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199239 conditions, 27897 events. 20833/27897 cut-off events. For 436193/443308 co-relation queries the response was YES. Maximal size of possible extension queue 1379. Compared 153587 event pairs, 2193 based on Foata normal form. 4669/31768 useless extension candidates. Maximal degree in co-relation 181215. Up to 15308 conditions per place. [2023-08-27 14:50:46,058 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 228 selfloop transitions, 294 changer transitions 3/541 dead transitions. [2023-08-27 14:50:46,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 541 transitions, 8715 flow [2023-08-27 14:50:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:50:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:50:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1322 transitions. [2023-08-27 14:50:46,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789855072463768 [2023-08-27 14:50:46,062 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1322 transitions. [2023-08-27 14:50:46,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1322 transitions. [2023-08-27 14:50:46,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:46,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1322 transitions. [2023-08-27 14:50:46,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.16666666666667) internal successors, (1322), 12 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:46,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:46,068 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 230.0) internal successors, (2990), 13 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:46,068 INFO L175 Difference]: Start difference. First operand has 79 places, 210 transitions, 3377 flow. Second operand 12 states and 1322 transitions. [2023-08-27 14:50:46,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 541 transitions, 8715 flow [2023-08-27 14:50:47,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 541 transitions, 8599 flow, removed 58 selfloop flow, removed 0 redundant places. [2023-08-27 14:50:47,120 INFO L231 Difference]: Finished difference. Result has 95 places, 429 transitions, 8289 flow [2023-08-27 14:50:47,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8289, PETRI_PLACES=95, PETRI_TRANSITIONS=429} [2023-08-27 14:50:47,120 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2023-08-27 14:50:47,120 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 429 transitions, 8289 flow [2023-08-27 14:50:47,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.0) internal successors, (1386), 14 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:47,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:47,121 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-27 14:50:47,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 14:50:47,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:47,326 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:50:47,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:47,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1669436814, now seen corresponding path program 3 times [2023-08-27 14:50:47,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:47,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637830067] [2023-08-27 14:50:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:47,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:50:47,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:47,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637830067] [2023-08-27 14:50:47,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637830067] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316065571] [2023-08-27 14:50:47,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:50:47,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:47,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:47,460 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) [2023-08-27 14:50:47,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 14:50:47,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:50:47,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:50:47,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:50:47,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:50:47,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:50:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316065571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:47,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:47,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-27 14:50:47,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538176285] [2023-08-27 14:50:47,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:47,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:50:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:50:47,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:50:47,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 230 [2023-08-27 14:50:47,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 429 transitions, 8289 flow. Second operand has 14 states, 14 states have (on average 98.64285714285714) internal successors, (1381), 14 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:47,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:47,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 230 [2023-08-27 14:50:47,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:50:56,640 INFO L124 PetriNetUnfolderBase]: 50217/66695 cut-off events. [2023-08-27 14:50:56,641 INFO L125 PetriNetUnfolderBase]: For 1011449/1016682 co-relation queries the response was YES. [2023-08-27 14:50:56,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502510 conditions, 66695 events. 50217/66695 cut-off events. For 1011449/1016682 co-relation queries the response was YES. Maximal size of possible extension queue 2741. Compared 390794 event pairs, 3714 based on Foata normal form. 6164/72855 useless extension candidates. Maximal degree in co-relation 430948. Up to 30803 conditions per place. [2023-08-27 14:50:57,337 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 1960 selfloop transitions, 798 changer transitions 0/2762 dead transitions. [2023-08-27 14:50:57,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 2762 transitions, 57000 flow [2023-08-27 14:50:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 14:50:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 14:50:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4108 transitions. [2023-08-27 14:50:57,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579710144927536 [2023-08-27 14:50:57,344 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4108 transitions. [2023-08-27 14:50:57,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4108 transitions. [2023-08-27 14:50:57,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:50:57,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4108 transitions. [2023-08-27 14:50:57,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 105.33333333333333) internal successors, (4108), 39 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:57,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 230.0) internal successors, (9200), 40 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:57,384 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 230.0) internal successors, (9200), 40 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:57,384 INFO L175 Difference]: Start difference. First operand has 95 places, 429 transitions, 8289 flow. Second operand 39 states and 4108 transitions. [2023-08-27 14:50:57,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 2762 transitions, 57000 flow [2023-08-27 14:51:03,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 2762 transitions, 50120 flow, removed 3440 selfloop flow, removed 0 redundant places. [2023-08-27 14:51:03,539 INFO L231 Difference]: Finished difference. Result has 162 places, 1226 transitions, 23724 flow [2023-08-27 14:51:03,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=7241, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=23724, PETRI_PLACES=162, PETRI_TRANSITIONS=1226} [2023-08-27 14:51:03,539 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2023-08-27 14:51:03,540 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 1226 transitions, 23724 flow [2023-08-27 14:51:03,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 98.64285714285714) internal successors, (1381), 14 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:03,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:51:03,540 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-27 14:51:03,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 14:51:03,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 14:51:03,745 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:51:03,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:51:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1869976691, now seen corresponding path program 4 times [2023-08-27 14:51:03,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:51:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774555793] [2023-08-27 14:51:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:51:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:51:03,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:51:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774555793] [2023-08-27 14:51:03,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774555793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:51:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476422293] [2023-08-27 14:51:03,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:51:03,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:03,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:51:03,905 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) [2023-08-27 14:51:03,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 14:51:04,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:51:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:51:04,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:51:04,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:51:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:51:04,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:51:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:51:04,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476422293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:51:04,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:51:04,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-27 14:51:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955600740] [2023-08-27 14:51:04,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:51:04,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 14:51:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:51:04,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 14:51:04,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-27 14:51:04,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 230 [2023-08-27 14:51:04,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 1226 transitions, 23724 flow. Second operand has 12 states, 12 states have (on average 101.5) internal successors, (1218), 12 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:04,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:51:04,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 230 [2023-08-27 14:51:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:51:19,876 INFO L124 PetriNetUnfolderBase]: 55517/73707 cut-off events. [2023-08-27 14:51:19,876 INFO L125 PetriNetUnfolderBase]: For 2176735/2181845 co-relation queries the response was YES. [2023-08-27 14:51:20,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670244 conditions, 73707 events. 55517/73707 cut-off events. For 2176735/2181845 co-relation queries the response was YES. Maximal size of possible extension queue 3339. Compared 440357 event pairs, 10507 based on Foata normal form. 4536/76493 useless extension candidates. Maximal degree in co-relation 626981. Up to 47703 conditions per place. [2023-08-27 14:51:20,832 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 1305 selfloop transitions, 236 changer transitions 154/1754 dead transitions. [2023-08-27 14:51:20,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1754 transitions, 37846 flow [2023-08-27 14:51:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:51:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:51:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 902 transitions. [2023-08-27 14:51:20,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902173913043478 [2023-08-27 14:51:20,835 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 902 transitions. [2023-08-27 14:51:20,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 902 transitions. [2023-08-27 14:51:20,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:51:20,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 902 transitions. [2023-08-27 14:51:20,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.75) internal successors, (902), 8 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:20,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:20,839 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:20,839 INFO L175 Difference]: Start difference. First operand has 162 places, 1226 transitions, 23724 flow. Second operand 8 states and 902 transitions. [2023-08-27 14:51:20,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1754 transitions, 37846 flow [2023-08-27 14:51:48,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 1754 transitions, 35668 flow, removed 994 selfloop flow, removed 2 redundant places. [2023-08-27 14:51:48,165 INFO L231 Difference]: Finished difference. Result has 171 places, 1253 transitions, 22704 flow [2023-08-27 14:51:48,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=21546, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=992, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22704, PETRI_PLACES=171, PETRI_TRANSITIONS=1253} [2023-08-27 14:51:48,166 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 133 predicate places. [2023-08-27 14:51:48,166 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 1253 transitions, 22704 flow [2023-08-27 14:51:48,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 101.5) internal successors, (1218), 12 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:48,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:51:48,166 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-27 14:51:48,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 14:51:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:48,370 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:51:48,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:51:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash -309691484, now seen corresponding path program 5 times [2023-08-27 14:51:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:51:48,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297018405] [2023-08-27 14:51:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:51:48,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:51:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:51:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:51:48,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:51:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297018405] [2023-08-27 14:51:48,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297018405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:51:48,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394423941] [2023-08-27 14:51:48,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:51:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:51:48,487 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) [2023-08-27 14:51:48,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 14:51:48,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:51:48,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:51:48,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:51:48,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:51:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:51:48,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:51:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:51:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394423941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:51:48,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:51:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-27 14:51:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822520759] [2023-08-27 14:51:48,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:51:48,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:51:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:51:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:51:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:51:48,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 230 [2023-08-27 14:51:48,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 1253 transitions, 22704 flow. Second operand has 14 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:51:48,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:51:48,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 230 [2023-08-27 14:51:48,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:52:20,304 INFO L124 PetriNetUnfolderBase]: 113201/148730 cut-off events. [2023-08-27 14:52:20,304 INFO L125 PetriNetUnfolderBase]: For 4176751/4180898 co-relation queries the response was YES. [2023-08-27 14:52:21,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363417 conditions, 148730 events. 113201/148730 cut-off events. For 4176751/4180898 co-relation queries the response was YES. Maximal size of possible extension queue 5806. Compared 919058 event pairs, 9259 based on Foata normal form. 8867/157304 useless extension candidates. Maximal degree in co-relation 1225499. Up to 72631 conditions per place. [2023-08-27 14:52:22,388 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 3538 selfloop transitions, 2485 changer transitions 207/6255 dead transitions. [2023-08-27 14:52:22,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 6255 transitions, 128467 flow [2023-08-27 14:52:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 14:52:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 14:52:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3761 transitions. [2023-08-27 14:52:22,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542270531400966 [2023-08-27 14:52:22,393 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3761 transitions. [2023-08-27 14:52:22,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3761 transitions. [2023-08-27 14:52:22,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:52:22,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3761 transitions. [2023-08-27 14:52:22,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.47222222222223) internal successors, (3761), 36 states have internal predecessors, (3761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:52:22,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 230.0) internal successors, (8510), 37 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:52:22,405 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 230.0) internal successors, (8510), 37 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:52:22,405 INFO L175 Difference]: Start difference. First operand has 171 places, 1253 transitions, 22704 flow. Second operand 36 states and 3761 transitions. [2023-08-27 14:52:22,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 6255 transitions, 128467 flow [2023-08-27 14:55:30,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 6255 transitions, 127617 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-27 14:55:30,570 INFO L231 Difference]: Finished difference. Result has 229 places, 3391 transitions, 72665 flow [2023-08-27 14:55:30,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=22276, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=72665, PETRI_PLACES=229, PETRI_TRANSITIONS=3391} [2023-08-27 14:55:30,572 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 191 predicate places. [2023-08-27 14:55:30,572 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 3391 transitions, 72665 flow [2023-08-27 14:55:30,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.5) internal successors, (1365), 14 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:55:30,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:55:30,572 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-27 14:55:30,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 14:55:30,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:55:30,778 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-27 14:55:30,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:55:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1998363457, now seen corresponding path program 6 times [2023-08-27 14:55:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:55:30,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611963880] [2023-08-27 14:55:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:55:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:55:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:55:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:55:30,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:55:30,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611963880] [2023-08-27 14:55:30,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611963880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:55:30,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026986510] [2023-08-27 14:55:30,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:55:30,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:55:30,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:55:30,906 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) [2023-08-27 14:55:30,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 14:55:31,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 14:55:31,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:55:31,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:55:31,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:55:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:55:31,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:55:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:55:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026986510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:55:31,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:55:31,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-27 14:55:31,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165677927] [2023-08-27 14:55:31,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:55:31,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 14:55:31,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:55:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 14:55:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:55:31,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 230 [2023-08-27 14:55:31,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 3391 transitions, 72665 flow. Second operand has 16 states, 16 states have (on average 97.3125) internal successors, (1557), 16 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:55:31,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:55:31,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 230 [2023-08-27 14:55:31,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:57:06,149 INFO L124 PetriNetUnfolderBase]: 169699/222526 cut-off events. [2023-08-27 14:57:06,149 INFO L125 PetriNetUnfolderBase]: For 12645390/12651203 co-relation queries the response was YES. [2023-08-27 14:57:08,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2801488 conditions, 222526 events. 169699/222526 cut-off events. For 12645390/12651203 co-relation queries the response was YES. Maximal size of possible extension queue 7844. Compared 1415386 event pairs, 8579 based on Foata normal form. 8014/229526 useless extension candidates. Maximal degree in co-relation 2619239. Up to 107416 conditions per place. [2023-08-27 14:57:10,299 INFO L140 encePairwiseOnDemand]: 220/230 looper letters, 7083 selfloop transitions, 3116 changer transitions 220/10526 dead transitions. [2023-08-27 14:57:10,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 10526 transitions, 259589 flow [2023-08-27 14:57:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 14:57:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 14:57:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5674 transitions. [2023-08-27 14:57:10,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568438003220612 [2023-08-27 14:57:10,305 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5674 transitions. [2023-08-27 14:57:10,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5674 transitions. [2023-08-27 14:57:10,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:57:10,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5674 transitions. [2023-08-27 14:57:10,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 105.07407407407408) internal successors, (5674), 54 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:57:10,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 230.0) internal successors, (12650), 55 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:57:10,323 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 230.0) internal successors, (12650), 55 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:57:10,323 INFO L175 Difference]: Start difference. First operand has 229 places, 3391 transitions, 72665 flow. Second operand 54 states and 5674 transitions. [2023-08-27 14:57:10,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 10526 transitions, 259589 flow Received shutdown request... [2023-08-27 15:04:32,576 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:04:32,576 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:04:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-08-27 15:04:33,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 15:04:33,812 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2023-08-27 15:04:33,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 15:04:33,813 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 15:04:33,814 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2023-08-27 15:04:33,814 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-27 15:04:33,814 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-27 15:04:33,814 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-27 15:04:33,814 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 1, 1, 1, 1] [2023-08-27 15:04:33,816 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 15:04:33,816 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 15:04:33,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 03:04:33 BasicIcfg [2023-08-27 15:04:33,818 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 15:04:33,818 INFO L158 Benchmark]: Toolchain (without parser) took 842912.86ms. Allocated memory was 381.7MB in the beginning and 14.2GB in the end (delta: 13.8GB). Free memory was 357.9MB in the beginning and 5.7GB in the end (delta: -5.3GB). Peak memory consumption was 11.9GB. Max. memory is 16.0GB. [2023-08-27 15:04:33,818 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 381.7MB. Free memory is still 357.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:04:33,818 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.81ms. Allocated memory is still 381.7MB. Free memory was 357.9MB in the beginning and 345.9MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 15:04:33,818 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.33ms. Allocated memory is still 381.7MB. Free memory was 345.9MB in the beginning and 343.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:04:33,818 INFO L158 Benchmark]: Boogie Preprocessor took 27.33ms. Allocated memory is still 381.7MB. Free memory was 343.8MB in the beginning and 342.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:04:33,819 INFO L158 Benchmark]: RCFGBuilder took 328.28ms. Allocated memory is still 381.7MB. Free memory was 342.3MB in the beginning and 324.9MB in the end (delta: 17.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 15:04:33,819 INFO L158 Benchmark]: TraceAbstraction took 842335.45ms. Allocated memory was 381.7MB in the beginning and 14.2GB in the end (delta: 13.8GB). Free memory was 324.4MB in the beginning and 5.7GB in the end (delta: -5.4GB). Peak memory consumption was 11.9GB. Max. memory is 16.0GB. [2023-08-27 15:04:33,820 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 381.7MB. Free memory is still 357.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 177.81ms. Allocated memory is still 381.7MB. Free memory was 357.9MB in the beginning and 345.9MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.33ms. Allocated memory is still 381.7MB. Free memory was 345.9MB in the beginning and 343.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.33ms. Allocated memory is still 381.7MB. Free memory was 343.8MB in the beginning and 342.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 328.28ms. Allocated memory is still 381.7MB. Free memory was 342.3MB in the beginning and 324.9MB in the end (delta: 17.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 842335.45ms. Allocated memory was 381.7MB in the beginning and 14.2GB in the end (delta: 13.8GB). Free memory was 324.4MB in the beginning and 5.7GB in the end (delta: -5.4GB). Peak memory consumption was 11.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 119 PlacesBefore, 38 PlacesAfterwards, 116 TransitionsBefore, 29 TransitionsAfterwards, 2904 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 2847 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2712, independent: 2706, independent conditional: 0, independent unconditional: 2706, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1538, independent: 1534, independent conditional: 0, independent unconditional: 1534, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2712, independent: 1172, independent conditional: 0, independent unconditional: 1172, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 1538, unknown conditional: 0, unknown unconditional: 1538] , Statistics on independence cache: Total cache size (in pairs): 90, Positive cache size: 90, Positive conditional cache size: 0, Positive unconditional cache size: 90, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 168 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 842.2s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 834.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1452 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1452 mSDsluCounter, 423 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 328 mSDsCounter, 106 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8131 IncrementalHoareTripleChecker+Invalid, 8237 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 106 mSolverCounterUnsat, 95 mSDtfsCounter, 8131 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 680 GetRequests, 461 SyntacticMatches, 11 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72665occurred in iteration=15, InterpolantAutomatonStates: 150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 673 NumberOfCodeBlocks, 648 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 874 ConstructedInterpolants, 0 QuantifiedInterpolants, 4224 SizeOfPredicates, 14 NumberOfNonLiveVariables, 1658 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 59/118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown