/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:08:10,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:08:11,080 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-SemanticLbe.epf [2023-11-17 12:08:11,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:08:11,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:08:11,110 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:08:11,111 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:08:11,111 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:08:11,112 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:08:11,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:08:11,117 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:08:11,117 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:08:11,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:08:11,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:08:11,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:08:11,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:08:11,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:08:11,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:08:11,119 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:08:11,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:08:11,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:08:11,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:08:11,121 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:08:11,121 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:08:11,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:08:11,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:08:11,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:08:11,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:08:11,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:08:11,122 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:08:11,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:08:11,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:08:11,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:08:11,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:08:11,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:08:11,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:08:11,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:08:11,418 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:08:11,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-11-17 12:08:12,507 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:08:12,679 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:08:12,680 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-11-17 12:08:12,686 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f4643b8/4387b184ff0042b081dfbf718a77489c/FLAG6957e9beb [2023-11-17 12:08:12,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f4643b8/4387b184ff0042b081dfbf718a77489c [2023-11-17 12:08:12,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:08:12,697 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:08:12,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:08:12,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:08:12,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:08:12,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32002bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12, skipping insertion in model container [2023-11-17 12:08:12,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,719 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:08:12,824 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c[4303,4316] [2023-11-17 12:08:12,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:08:12,853 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:08:12,885 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c[4303,4316] [2023-11-17 12:08:12,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:08:12,897 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:08:12,898 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:08:12,905 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:08:12,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12 WrapperNode [2023-11-17 12:08:12,905 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:08:12,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:08:12,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:08:12,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:08:12,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,975 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 409 [2023-11-17 12:08:12,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:08:12,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:08:12,977 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:08:12,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:08:12,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:12,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:13,002 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:13,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:13,005 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:13,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:08:13,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:08:13,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:08:13,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:08:13,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (1/1) ... [2023-11-17 12:08:13,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:08:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:13,077 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) [2023-11-17 12:08:13,092 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 [2023-11-17 12:08:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:08:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:08:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:08:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:08:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:08:13,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:08:13,097 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:08:13,097 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:08:13,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 12:08:13,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-17 12:08:13,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-17 12:08:13,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:08:13,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:08:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:08:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:08:13,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:08:13,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:08:13,100 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:08:13,216 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:08:13,218 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:08:13,722 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:08:14,180 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:08:14,181 INFO L307 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-17 12:08:14,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:08:14 BoogieIcfgContainer [2023-11-17 12:08:14,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:08:14,184 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:08:14,184 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:08:14,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:08:14,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:08:12" (1/3) ... [2023-11-17 12:08:14,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43949c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:08:14, skipping insertion in model container [2023-11-17 12:08:14,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:08:12" (2/3) ... [2023-11-17 12:08:14,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43949c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:08:14, skipping insertion in model container [2023-11-17 12:08:14,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:08:14" (3/3) ... [2023-11-17 12:08:14,193 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-11-17 12:08:14,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:08:14,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:08:14,213 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:08:14,324 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-17 12:08:14,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 89 transitions, 244 flow [2023-11-17 12:08:14,423 INFO L124 PetriNetUnfolderBase]: 13/71 cut-off events. [2023-11-17 12:08:14,424 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 12:08:14,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 71 events. 13/71 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 167 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2023-11-17 12:08:14,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 89 transitions, 244 flow [2023-11-17 12:08:14,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 188 flow [2023-11-17 12:08:14,440 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:08:14,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 70 transitions, 188 flow [2023-11-17 12:08:14,453 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 70 transitions, 188 flow [2023-11-17 12:08:14,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 188 flow [2023-11-17 12:08:14,477 INFO L124 PetriNetUnfolderBase]: 13/70 cut-off events. [2023-11-17 12:08:14,478 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 12:08:14,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 70 events. 13/70 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 79. Up to 3 conditions per place. [2023-11-17 12:08:14,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 2510 [2023-11-17 12:08:15,900 INFO L134 LiptonReduction]: Checked pairs total: 5246 [2023-11-17 12:08:15,900 INFO L136 LiptonReduction]: Total number of compositions: 31 [2023-11-17 12:08:15,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:08:15,934 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6c3225d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:08:15,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-17 12:08:15,953 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:08:15,953 INFO L124 PetriNetUnfolderBase]: 9/46 cut-off events. [2023-11-17 12:08:15,953 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 12:08:15,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:15,954 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:15,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:15,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -229210014, now seen corresponding path program 1 times [2023-11-17 12:08:15,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:15,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362861296] [2023-11-17 12:08:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:15,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:16,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362861296] [2023-11-17 12:08:16,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362861296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:08:16,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:08:16,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:08:16,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966900905] [2023-11-17 12:08:16,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:08:16,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:08:16,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:08:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:08:16,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:16,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:16,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:16,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:16,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:19,476 INFO L124 PetriNetUnfolderBase]: 16175/20341 cut-off events. [2023-11-17 12:08:19,476 INFO L125 PetriNetUnfolderBase]: For 2725/2725 co-relation queries the response was YES. [2023-11-17 12:08:19,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44201 conditions, 20341 events. 16175/20341 cut-off events. For 2725/2725 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 90279 event pairs, 9888 based on Foata normal form. 72/14087 useless extension candidates. Maximal degree in co-relation 28696. Up to 13400 conditions per place. [2023-11-17 12:08:19,630 INFO L140 encePairwiseOnDemand]: 118/124 looper letters, 42 selfloop transitions, 2 changer transitions 35/83 dead transitions. [2023-11-17 12:08:19,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 417 flow [2023-11-17 12:08:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:08:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:08:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2023-11-17 12:08:19,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2862903225806452 [2023-11-17 12:08:19,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 142 transitions. [2023-11-17 12:08:19,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 142 transitions. [2023-11-17 12:08:19,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:19,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 142 transitions. [2023-11-17 12:08:19,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:19,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:19,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:19,654 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 142 flow. Second operand 4 states and 142 transitions. [2023-11-17 12:08:19,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 417 flow [2023-11-17 12:08:19,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 83 transitions, 355 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-17 12:08:19,703 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 128 flow [2023-11-17 12:08:19,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-11-17 12:08:19,708 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -7 predicate places. [2023-11-17 12:08:19,709 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 128 flow [2023-11-17 12:08:19,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:19,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:19,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:19,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:08:19,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:19,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1117940312, now seen corresponding path program 1 times [2023-11-17 12:08:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:19,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508053841] [2023-11-17 12:08:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:19,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:20,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508053841] [2023-11-17 12:08:20,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508053841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:08:20,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:08:20,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:08:20,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072524092] [2023-11-17 12:08:20,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:08:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:08:20,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:08:20,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:08:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:20,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 128 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:20,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:20,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:22,453 INFO L124 PetriNetUnfolderBase]: 20050/24778 cut-off events. [2023-11-17 12:08:22,454 INFO L125 PetriNetUnfolderBase]: For 2661/2661 co-relation queries the response was YES. [2023-11-17 12:08:22,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53963 conditions, 24778 events. 20050/24778 cut-off events. For 2661/2661 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 105249 event pairs, 2361 based on Foata normal form. 1/19729 useless extension candidates. Maximal degree in co-relation 53951. Up to 10956 conditions per place. [2023-11-17 12:08:22,644 INFO L140 encePairwiseOnDemand]: 115/124 looper letters, 123 selfloop transitions, 10 changer transitions 8/145 dead transitions. [2023-11-17 12:08:22,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 145 transitions, 659 flow [2023-11-17 12:08:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:08:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:08:22,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 231 transitions. [2023-11-17 12:08:22,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31048387096774194 [2023-11-17 12:08:22,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 231 transitions. [2023-11-17 12:08:22,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 231 transitions. [2023-11-17 12:08:22,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:22,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 231 transitions. [2023-11-17 12:08:22,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:22,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:22,660 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:22,660 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 128 flow. Second operand 6 states and 231 transitions. [2023-11-17 12:08:22,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 145 transitions, 659 flow [2023-11-17 12:08:22,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 145 transitions, 647 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-17 12:08:22,681 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 193 flow [2023-11-17 12:08:22,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-11-17 12:08:22,682 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-11-17 12:08:22,683 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 193 flow [2023-11-17 12:08:22,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:22,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:22,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:22,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:08:22,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:22,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash -372970714, now seen corresponding path program 2 times [2023-11-17 12:08:22,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:22,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817884393] [2023-11-17 12:08:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:22,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:23,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:23,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817884393] [2023-11-17 12:08:23,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817884393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:08:23,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:08:23,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:08:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869075303] [2023-11-17 12:08:23,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:08:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:08:23,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:08:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:08:23,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:23,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:23,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:23,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:23,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:25,137 INFO L124 PetriNetUnfolderBase]: 20047/24769 cut-off events. [2023-11-17 12:08:25,137 INFO L125 PetriNetUnfolderBase]: For 10406/10406 co-relation queries the response was YES. [2023-11-17 12:08:25,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63904 conditions, 24769 events. 20047/24769 cut-off events. For 10406/10406 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 105062 event pairs, 2451 based on Foata normal form. 1/23468 useless extension candidates. Maximal degree in co-relation 63890. Up to 10956 conditions per place. [2023-11-17 12:08:25,264 INFO L140 encePairwiseOnDemand]: 115/124 looper letters, 119 selfloop transitions, 12 changer transitions 8/143 dead transitions. [2023-11-17 12:08:25,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 143 transitions, 708 flow [2023-11-17 12:08:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:08:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:08:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2023-11-17 12:08:25,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30510752688172044 [2023-11-17 12:08:25,266 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 227 transitions. [2023-11-17 12:08:25,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 227 transitions. [2023-11-17 12:08:25,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:25,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 227 transitions. [2023-11-17 12:08:25,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.833333333333336) internal successors, (227), 6 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:25,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:25,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:25,269 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 193 flow. Second operand 6 states and 227 transitions. [2023-11-17 12:08:25,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 143 transitions, 708 flow [2023-11-17 12:08:25,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 143 transitions, 696 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 12:08:25,303 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 238 flow [2023-11-17 12:08:25,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-17 12:08:25,304 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-11-17 12:08:25,305 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 238 flow [2023-11-17 12:08:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:25,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:25,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:25,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:08:25,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:25,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1458199879, now seen corresponding path program 1 times [2023-11-17 12:08:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:25,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001108060] [2023-11-17 12:08:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:25,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:25,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001108060] [2023-11-17 12:08:25,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001108060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126682346] [2023-11-17 12:08:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:25,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:25,487 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) [2023-11-17 12:08:25,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:08:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:25,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:08:25,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:25,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126682346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:25,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:25,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-17 12:08:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340145704] [2023-11-17 12:08:25,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:25,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:08:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:08:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:08:25,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:25,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:25,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:25,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:25,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:28,654 INFO L124 PetriNetUnfolderBase]: 27565/35118 cut-off events. [2023-11-17 12:08:28,654 INFO L125 PetriNetUnfolderBase]: For 27558/27558 co-relation queries the response was YES. [2023-11-17 12:08:28,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92367 conditions, 35118 events. 27565/35118 cut-off events. For 27558/27558 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 173163 event pairs, 16519 based on Foata normal form. 1431/34462 useless extension candidates. Maximal degree in co-relation 92344. Up to 21798 conditions per place. [2023-11-17 12:08:28,816 INFO L140 encePairwiseOnDemand]: 118/124 looper letters, 118 selfloop transitions, 5 changer transitions 2/129 dead transitions. [2023-11-17 12:08:28,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 759 flow [2023-11-17 12:08:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:08:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:08:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2023-11-17 12:08:28,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2620967741935484 [2023-11-17 12:08:28,818 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 195 transitions. [2023-11-17 12:08:28,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 195 transitions. [2023-11-17 12:08:28,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:28,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 195 transitions. [2023-11-17 12:08:28,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:28,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:28,821 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:28,821 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 238 flow. Second operand 6 states and 195 transitions. [2023-11-17 12:08:28,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 759 flow [2023-11-17 12:08:28,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 129 transitions, 731 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 12:08:28,868 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 273 flow [2023-11-17 12:08:28,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-17 12:08:28,870 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-11-17 12:08:28,870 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 273 flow [2023-11-17 12:08:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.4) internal successors, (214), 10 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:28,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:28,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:28,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:08:29,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:29,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:29,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2114818435, now seen corresponding path program 1 times [2023-11-17 12:08:29,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953589930] [2023-11-17 12:08:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:29,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953589930] [2023-11-17 12:08:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953589930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691402999] [2023-11-17 12:08:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:29,350 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) [2023-11-17 12:08:29,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:08:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:29,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:08:29,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:29,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:29,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691402999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:29,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:29,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-17 12:08:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637591873] [2023-11-17 12:08:29,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:08:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:08:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:08:29,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:29,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:29,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:29,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:29,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:31,949 INFO L124 PetriNetUnfolderBase]: 21341/27130 cut-off events. [2023-11-17 12:08:31,949 INFO L125 PetriNetUnfolderBase]: For 25244/25244 co-relation queries the response was YES. [2023-11-17 12:08:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72766 conditions, 27130 events. 21341/27130 cut-off events. For 25244/25244 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 128813 event pairs, 12229 based on Foata normal form. 520/26111 useless extension candidates. Maximal degree in co-relation 70434. Up to 21932 conditions per place. [2023-11-17 12:08:32,084 INFO L140 encePairwiseOnDemand]: 118/124 looper letters, 73 selfloop transitions, 4 changer transitions 36/117 dead transitions. [2023-11-17 12:08:32,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 117 transitions, 676 flow [2023-11-17 12:08:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:08:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:08:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2023-11-17 12:08:32,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2567204301075269 [2023-11-17 12:08:32,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 191 transitions. [2023-11-17 12:08:32,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 191 transitions. [2023-11-17 12:08:32,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:32,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 191 transitions. [2023-11-17 12:08:32,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.833333333333332) internal successors, (191), 6 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:32,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:32,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:32,218 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 273 flow. Second operand 6 states and 191 transitions. [2023-11-17 12:08:32,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 117 transitions, 676 flow [2023-11-17 12:08:32,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 117 transitions, 668 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 12:08:32,251 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 266 flow [2023-11-17 12:08:32,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-11-17 12:08:32,251 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-11-17 12:08:32,251 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 266 flow [2023-11-17 12:08:32,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.5) internal successors, (205), 10 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:32,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:32,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:32,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:08:32,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:32,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:32,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:32,459 INFO L85 PathProgramCache]: Analyzing trace with hash -813558696, now seen corresponding path program 1 times [2023-11-17 12:08:32,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:32,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889507763] [2023-11-17 12:08:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:32,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:32,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:32,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889507763] [2023-11-17 12:08:32,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889507763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331173685] [2023-11-17 12:08:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:32,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:32,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:32,680 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) [2023-11-17 12:08:32,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:08:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:32,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:08:32,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:33,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:33,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331173685] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:33,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:08:33,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-11-17 12:08:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130484729] [2023-11-17 12:08:33,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:08:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:08:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:08:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:08:33,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:33,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:33,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:33,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:33,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:35,228 INFO L124 PetriNetUnfolderBase]: 21312/26456 cut-off events. [2023-11-17 12:08:35,228 INFO L125 PetriNetUnfolderBase]: For 23492/23492 co-relation queries the response was YES. [2023-11-17 12:08:35,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73373 conditions, 26456 events. 21312/26456 cut-off events. For 23492/23492 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 116259 event pairs, 5425 based on Foata normal form. 104/25042 useless extension candidates. Maximal degree in co-relation 73335. Up to 11076 conditions per place. [2023-11-17 12:08:35,335 INFO L140 encePairwiseOnDemand]: 118/124 looper letters, 103 selfloop transitions, 11 changer transitions 2/120 dead transitions. [2023-11-17 12:08:35,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 120 transitions, 670 flow [2023-11-17 12:08:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:08:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:08:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2023-11-17 12:08:35,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26881720430107525 [2023-11-17 12:08:35,337 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 200 transitions. [2023-11-17 12:08:35,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 200 transitions. [2023-11-17 12:08:35,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:35,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 200 transitions. [2023-11-17 12:08:35,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:35,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:35,338 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:35,338 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 266 flow. Second operand 6 states and 200 transitions. [2023-11-17 12:08:35,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 120 transitions, 670 flow [2023-11-17 12:08:35,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 604 flow, removed 17 selfloop flow, removed 10 redundant places. [2023-11-17 12:08:35,664 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 238 flow [2023-11-17 12:08:35,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-17 12:08:35,665 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2023-11-17 12:08:35,665 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 238 flow [2023-11-17 12:08:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:35,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:35,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:35,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:08:35,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:35,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:35,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 164044191, now seen corresponding path program 1 times [2023-11-17 12:08:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057538853] [2023-11-17 12:08:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:35,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:08:35,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057538853] [2023-11-17 12:08:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057538853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:08:35,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:08:35,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:08:35,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667681257] [2023-11-17 12:08:35,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:08:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:08:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:08:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:08:35,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:35,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 238 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:35,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:35,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:35,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:38,025 INFO L124 PetriNetUnfolderBase]: 25844/32294 cut-off events. [2023-11-17 12:08:38,026 INFO L125 PetriNetUnfolderBase]: For 24325/24325 co-relation queries the response was YES. [2023-11-17 12:08:38,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86311 conditions, 32294 events. 25844/32294 cut-off events. For 24325/24325 co-relation queries the response was YES. Maximal size of possible extension queue 988. Compared 146723 event pairs, 6990 based on Foata normal form. 252/30616 useless extension candidates. Maximal degree in co-relation 86279. Up to 19796 conditions per place. [2023-11-17 12:08:38,164 INFO L140 encePairwiseOnDemand]: 117/124 looper letters, 123 selfloop transitions, 11 changer transitions 5/143 dead transitions. [2023-11-17 12:08:38,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 143 transitions, 748 flow [2023-11-17 12:08:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:08:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:08:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2023-11-17 12:08:38,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33064516129032256 [2023-11-17 12:08:38,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 205 transitions. [2023-11-17 12:08:38,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 205 transitions. [2023-11-17 12:08:38,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:38,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 205 transitions. [2023-11-17 12:08:38,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:38,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:38,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 124.0) internal successors, (744), 6 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:38,168 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 238 flow. Second operand 5 states and 205 transitions. [2023-11-17 12:08:38,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 143 transitions, 748 flow [2023-11-17 12:08:38,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 143 transitions, 731 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:08:38,297 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 296 flow [2023-11-17 12:08:38,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2023-11-17 12:08:38,298 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-11-17 12:08:38,298 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 296 flow [2023-11-17 12:08:38,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:38,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:38,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:38,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:08:38,299 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:38,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1856265903, now seen corresponding path program 2 times [2023-11-17 12:08:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290331628] [2023-11-17 12:08:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:38,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:38,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290331628] [2023-11-17 12:08:38,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290331628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:38,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352155751] [2023-11-17 12:08:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:08:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:38,426 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) [2023-11-17 12:08:38,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:08:38,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:08:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:08:38,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:08:38,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:38,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:08:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352155751] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:38,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 12:08:38,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-11-17 12:08:38,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365481282] [2023-11-17 12:08:38,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:08:38,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:08:38,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:08:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:08:38,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:38,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:38,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:38,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:38,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:41,337 INFO L124 PetriNetUnfolderBase]: 25692/31912 cut-off events. [2023-11-17 12:08:41,337 INFO L125 PetriNetUnfolderBase]: For 36812/36812 co-relation queries the response was YES. [2023-11-17 12:08:41,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95669 conditions, 31912 events. 25692/31912 cut-off events. For 36812/36812 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 141780 event pairs, 4237 based on Foata normal form. 120/30130 useless extension candidates. Maximal degree in co-relation 95635. Up to 11738 conditions per place. [2023-11-17 12:08:41,486 INFO L140 encePairwiseOnDemand]: 117/124 looper letters, 132 selfloop transitions, 18 changer transitions 4/158 dead transitions. [2023-11-17 12:08:41,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 158 transitions, 937 flow [2023-11-17 12:08:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:08:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:08:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 245 transitions. [2023-11-17 12:08:41,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28225806451612906 [2023-11-17 12:08:41,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 245 transitions. [2023-11-17 12:08:41,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 245 transitions. [2023-11-17 12:08:41,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:41,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 245 transitions. [2023-11-17 12:08:41,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:41,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:41,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:41,491 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 296 flow. Second operand 7 states and 245 transitions. [2023-11-17 12:08:41,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 158 transitions, 937 flow [2023-11-17 12:08:41,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 158 transitions, 915 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-17 12:08:41,795 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 386 flow [2023-11-17 12:08:41,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-11-17 12:08:41,796 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 16 predicate places. [2023-11-17 12:08:41,796 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 386 flow [2023-11-17 12:08:41,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:41,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:41,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:41,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 12:08:41,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:42,000 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:42,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1590268262, now seen corresponding path program 1 times [2023-11-17 12:08:42,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:42,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185766241] [2023-11-17 12:08:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:43,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185766241] [2023-11-17 12:08:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185766241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709309600] [2023-11-17 12:08:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:43,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:43,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:43,141 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) [2023-11-17 12:08:43,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:08:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:43,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:08:43,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:44,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 12:08:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:08:44,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:44,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:08:44,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-17 12:08:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:08:44,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709309600] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:44,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:44,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-17 12:08:44,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207938003] [2023-11-17 12:08:44,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:44,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:08:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:08:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:08:44,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:44,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 386 flow. Second operand has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:44,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:44,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:44,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:52,043 INFO L124 PetriNetUnfolderBase]: 70126/88104 cut-off events. [2023-11-17 12:08:52,043 INFO L125 PetriNetUnfolderBase]: For 176688/176688 co-relation queries the response was YES. [2023-11-17 12:08:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276880 conditions, 88104 events. 70126/88104 cut-off events. For 176688/176688 co-relation queries the response was YES. Maximal size of possible extension queue 2580. Compared 453530 event pairs, 6205 based on Foata normal form. 892/83566 useless extension candidates. Maximal degree in co-relation 207092. Up to 38802 conditions per place. [2023-11-17 12:08:52,529 INFO L140 encePairwiseOnDemand]: 110/124 looper letters, 398 selfloop transitions, 89 changer transitions 54/545 dead transitions. [2023-11-17 12:08:52,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 545 transitions, 3248 flow [2023-11-17 12:08:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:08:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:08:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 916 transitions. [2023-11-17 12:08:52,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2735961768219833 [2023-11-17 12:08:52,532 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 916 transitions. [2023-11-17 12:08:52,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 916 transitions. [2023-11-17 12:08:52,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:52,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 916 transitions. [2023-11-17 12:08:52,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 33.925925925925924) internal successors, (916), 27 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:52,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:52,538 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:52,538 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 386 flow. Second operand 27 states and 916 transitions. [2023-11-17 12:08:52,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 545 transitions, 3248 flow [2023-11-17 12:08:54,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 545 transitions, 3191 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 12:08:54,829 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 1321 flow [2023-11-17 12:08:54,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1321, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2023-11-17 12:08:54,829 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2023-11-17 12:08:54,829 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 1321 flow [2023-11-17 12:08:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.72222222222222) internal successors, (373), 18 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:54,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:54,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:54,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-17 12:08:55,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:55,036 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:08:55,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:55,036 INFO L85 PathProgramCache]: Analyzing trace with hash -655064097, now seen corresponding path program 1 times [2023-11-17 12:08:55,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:55,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028025918] [2023-11-17 12:08:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:55,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028025918] [2023-11-17 12:08:55,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028025918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082110793] [2023-11-17 12:08:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:55,794 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) [2023-11-17 12:08:55,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:08:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:55,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:08:55,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:56,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 12:08:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:08:56,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:56,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:08:56,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-17 12:08:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:08:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082110793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:56,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 18 [2023-11-17 12:08:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833466445] [2023-11-17 12:08:56,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:08:56,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:56,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:08:56,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:08:56,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:08:56,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 1321 flow. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:56,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:56,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:08:56,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:09:13,405 INFO L124 PetriNetUnfolderBase]: 122712/153985 cut-off events. [2023-11-17 12:09:13,406 INFO L125 PetriNetUnfolderBase]: For 463662/463667 co-relation queries the response was YES. [2023-11-17 12:09:14,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556456 conditions, 153985 events. 122712/153985 cut-off events. For 463662/463667 co-relation queries the response was YES. Maximal size of possible extension queue 4452. Compared 842378 event pairs, 12035 based on Foata normal form. 9/144238 useless extension candidates. Maximal degree in co-relation 556261. Up to 75155 conditions per place. [2023-11-17 12:09:15,122 INFO L140 encePairwiseOnDemand]: 108/124 looper letters, 486 selfloop transitions, 118 changer transitions 33/641 dead transitions. [2023-11-17 12:09:15,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 641 transitions, 5490 flow [2023-11-17 12:09:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:09:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:09:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 715 transitions. [2023-11-17 12:09:15,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28830645161290325 [2023-11-17 12:09:15,141 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 715 transitions. [2023-11-17 12:09:15,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 715 transitions. [2023-11-17 12:09:15,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:09:15,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 715 transitions. [2023-11-17 12:09:15,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 35.75) internal successors, (715), 20 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:15,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:15,159 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 124.0) internal successors, (2604), 21 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:15,159 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 1321 flow. Second operand 20 states and 715 transitions. [2023-11-17 12:09:15,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 641 transitions, 5490 flow [2023-11-17 12:09:27,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 641 transitions, 5302 flow, removed 87 selfloop flow, removed 8 redundant places. [2023-11-17 12:09:27,961 INFO L231 Difference]: Finished difference. Result has 132 places, 247 transitions, 2539 flow [2023-11-17 12:09:27,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2539, PETRI_PLACES=132, PETRI_TRANSITIONS=247} [2023-11-17 12:09:27,962 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2023-11-17 12:09:27,962 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 247 transitions, 2539 flow [2023-11-17 12:09:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:27,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:09:27,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:09:27,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:09:28,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:09:28,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-17 12:09:28,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:09:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1586739525, now seen corresponding path program 2 times [2023-11-17 12:09:28,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:09:28,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861709659] [2023-11-17 12:09:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:09:28,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:09:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:09:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:09:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861709659] [2023-11-17 12:09:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861709659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:09:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690788817] [2023-11-17 12:09:28,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:09:28,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:09:28,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:09:28,812 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) [2023-11-17 12:09:28,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:09:29,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:09:29,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:09:29,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 12:09:29,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:09:29,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 12:09:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:09:29,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:09:29,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:09:29,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-11-17 12:09:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 12:09:29,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690788817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:09:29,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:09:29,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 19 [2023-11-17 12:09:29,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481522689] [2023-11-17 12:09:29,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:09:29,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:09:29,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:09:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:09:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:09:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 124 [2023-11-17 12:09:29,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 247 transitions, 2539 flow. Second operand has 20 states, 20 states have (on average 20.2) internal successors, (404), 20 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:09:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 124 [2023-11-17 12:09:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand