/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:08:07,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:08:07,594 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 16:08:07,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:08:07,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:08:07,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:08:07,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:08:07,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:08:07,627 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:08:07,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:08:07,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:08:07,628 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:08:07,629 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:08:07,629 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:08:07,629 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:08:07,630 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:08:07,630 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:08:07,630 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:08:07,631 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:08:07,631 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:08:07,631 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:08:07,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:08:07,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:08:07,636 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:08:07,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:08:07,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:07,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:08:07,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:08:07,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:08:07,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:08:07,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:08:07,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:08:07,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:08:07,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:08:07,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:08:07,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:08:07,896 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:08:07,897 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:08:07,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-17 16:08:09,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:08:09,247 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:08:09,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-17 16:08:09,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294535c28/0975bef0d656443ebc0ccb132dbd0fff/FLAGc9e63769b [2023-11-17 16:08:09,268 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/294535c28/0975bef0d656443ebc0ccb132dbd0fff [2023-11-17 16:08:09,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:08:09,270 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:08:09,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:09,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:08:09,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:08:09,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6b1027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09, skipping insertion in model container [2023-11-17 16:08:09,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,301 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:08:09,458 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/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-17 16:08:09,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:09,475 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:08:09,500 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/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-17 16:08:09,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:08:09,512 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:09,512 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:08:09,518 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:08:09,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09 WrapperNode [2023-11-17 16:08:09,519 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:08:09,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:09,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:08:09,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:08:09,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,567 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 331 [2023-11-17 16:08:09,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:08:09,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:08:09,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:08:09,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:08:09,576 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,580 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,605 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,608 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,621 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:08:09,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:08:09,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:08:09,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:08:09,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (1/1) ... [2023-11-17 16:08:09,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:08:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:09,652 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 16:08:09,658 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 16:08:09,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:08:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:08:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:08:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:08:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:08:09,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:08:09,678 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:08:09,678 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:08:09,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:08:09,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:08:09,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:08:09,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:08:09,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:08:09,681 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 16:08:09,779 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:08:09,781 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:08:10,232 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:08:10,448 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:08:10,449 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 16:08:10,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:10 BoogieIcfgContainer [2023-11-17 16:08:10,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:08:10,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:08:10,454 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:08:10,457 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:08:10,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:08:09" (1/3) ... [2023-11-17 16:08:10,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441c8c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:10, skipping insertion in model container [2023-11-17 16:08:10,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:08:09" (2/3) ... [2023-11-17 16:08:10,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441c8c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:08:10, skipping insertion in model container [2023-11-17 16:08:10,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:08:10" (3/3) ... [2023-11-17 16:08:10,460 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-11-17 16:08:10,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:08:10,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:08:10,476 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:08:10,584 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:08:10,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 258 transitions, 544 flow [2023-11-17 16:08:10,733 INFO L124 PetriNetUnfolderBase]: 19/254 cut-off events. [2023-11-17 16:08:10,733 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:08:10,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 254 events. 19/254 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2023-11-17 16:08:10,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 258 transitions, 544 flow [2023-11-17 16:08:10,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 241 transitions, 506 flow [2023-11-17 16:08:10,748 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:08:10,773 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 241 transitions, 506 flow [2023-11-17 16:08:10,777 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 241 transitions, 506 flow [2023-11-17 16:08:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 241 transitions, 506 flow [2023-11-17 16:08:10,821 INFO L124 PetriNetUnfolderBase]: 19/241 cut-off events. [2023-11-17 16:08:10,821 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:08:10,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 241 events. 19/241 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 214. Up to 2 conditions per place. [2023-11-17 16:08:10,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-17 16:08:19,396 INFO L134 LiptonReduction]: Checked pairs total: 3215 [2023-11-17 16:08:19,396 INFO L136 LiptonReduction]: Total number of compositions: 251 [2023-11-17 16:08:19,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:08:19,415 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;@6da47a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:08:19,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:08:19,421 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:08:19,422 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-11-17 16:08:19,422 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:08:19,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:19,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:19,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:19,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1474123186, now seen corresponding path program 1 times [2023-11-17 16:08:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:19,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866167931] [2023-11-17 16:08:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:20,111 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 16:08:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:20,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866167931] [2023-11-17 16:08:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866167931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:20,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:20,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897008514] [2023-11-17 16:08:20,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:20,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:20,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 509 [2023-11-17 16:08:20,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 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 16:08:20,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:20,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 509 [2023-11-17 16:08:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:20,565 INFO L124 PetriNetUnfolderBase]: 1945/2598 cut-off events. [2023-11-17 16:08:20,565 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-17 16:08:20,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5377 conditions, 2598 events. 1945/2598 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9648 event pairs, 199 based on Foata normal form. 0/1986 useless extension candidates. Maximal degree in co-relation 5088. Up to 1645 conditions per place. [2023-11-17 16:08:20,586 INFO L140 encePairwiseOnDemand]: 504/509 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-17 16:08:20,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 320 flow [2023-11-17 16:08:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1180 transitions. [2023-11-17 16:08:20,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636542239685658 [2023-11-17 16:08:20,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1180 transitions. [2023-11-17 16:08:20,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1180 transitions. [2023-11-17 16:08:20,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:20,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1180 transitions. [2023-11-17 16:08:20,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 0 states have call successors, (0), 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 16:08:20,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 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 16:08:20,629 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 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 16:08:20,631 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 5 states and 1180 transitions. [2023-11-17 16:08:20,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 320 flow [2023-11-17 16:08:20,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 70 transitions, 292 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:08:20,640 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 94 flow [2023-11-17 16:08:20,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-17 16:08:20,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-17 16:08:20,646 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 94 flow [2023-11-17 16:08:20,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 227.4) internal successors, (1137), 5 states have internal predecessors, (1137), 0 states have call successors, (0), 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 16:08:20,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:20,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:20,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:08:20,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:20,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:20,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1123758089, now seen corresponding path program 1 times [2023-11-17 16:08:20,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:20,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582236678] [2023-11-17 16:08:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:20,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:20,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582236678] [2023-11-17 16:08:20,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582236678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:20,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:20,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:08:20,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774324089] [2023-11-17 16:08:20,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:20,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:08:20,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:20,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:08:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:08:20,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 509 [2023-11-17 16:08:20,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 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 16:08:20,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:20,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 509 [2023-11-17 16:08:20,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:21,190 INFO L124 PetriNetUnfolderBase]: 2374/3227 cut-off events. [2023-11-17 16:08:21,190 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-11-17 16:08:21,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7136 conditions, 3227 events. 2374/3227 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11500 event pairs, 1822 based on Foata normal form. 98/2613 useless extension candidates. Maximal degree in co-relation 3186. Up to 2423 conditions per place. [2023-11-17 16:08:21,209 INFO L140 encePairwiseOnDemand]: 502/509 looper letters, 33 selfloop transitions, 2 changer transitions 22/59 dead transitions. [2023-11-17 16:08:21,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 265 flow [2023-11-17 16:08:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:08:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:08:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1073 transitions. [2023-11-17 16:08:21,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216110019646365 [2023-11-17 16:08:21,213 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1073 transitions. [2023-11-17 16:08:21,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1073 transitions. [2023-11-17 16:08:21,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:21,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1073 transitions. [2023-11-17 16:08:21,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 16:08:21,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 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 16:08:21,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 509.0) internal successors, (3054), 6 states have internal predecessors, (3054), 0 states have call successors, (0), 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 16:08:21,222 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 94 flow. Second operand 5 states and 1073 transitions. [2023-11-17 16:08:21,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 265 flow [2023-11-17 16:08:21,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 252 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 16:08:21,224 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 106 flow [2023-11-17 16:08:21,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-17 16:08:21,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-11-17 16:08:21,225 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 106 flow [2023-11-17 16:08:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 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 16:08:21,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:21,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:08:21,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:21,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1228634178, now seen corresponding path program 1 times [2023-11-17 16:08:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082705714] [2023-11-17 16:08:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:21,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082705714] [2023-11-17 16:08:21,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082705714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:21,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184502012] [2023-11-17 16:08:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:21,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:21,433 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 16:08:21,461 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 16:08:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:21,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:08:21,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:21,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:08:21,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184502012] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:21,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:08:21,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 14 [2023-11-17 16:08:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912324273] [2023-11-17 16:08:21,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:21,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:08:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:21,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:08:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:08:21,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 509 [2023-11-17 16:08:21,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 220.83333333333334) internal successors, (1325), 6 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:21,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:21,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 509 [2023-11-17 16:08:21,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:22,467 INFO L124 PetriNetUnfolderBase]: 3225/4317 cut-off events. [2023-11-17 16:08:22,468 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2023-11-17 16:08:22,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9903 conditions, 4317 events. 3225/4317 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17304 event pairs, 143 based on Foata normal form. 92/3603 useless extension candidates. Maximal degree in co-relation 9889. Up to 1337 conditions per place. [2023-11-17 16:08:22,494 INFO L140 encePairwiseOnDemand]: 501/509 looper letters, 100 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2023-11-17 16:08:22,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 114 transitions, 526 flow [2023-11-17 16:08:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:08:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:08:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1623 transitions. [2023-11-17 16:08:22,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45551501543642997 [2023-11-17 16:08:22,498 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1623 transitions. [2023-11-17 16:08:22,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1623 transitions. [2023-11-17 16:08:22,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:22,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1623 transitions. [2023-11-17 16:08:22,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 231.85714285714286) internal successors, (1623), 7 states have internal predecessors, (1623), 0 states have call successors, (0), 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 16:08:22,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 509.0) internal successors, (4072), 8 states have internal predecessors, (4072), 0 states have call successors, (0), 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 16:08:22,509 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 509.0) internal successors, (4072), 8 states have internal predecessors, (4072), 0 states have call successors, (0), 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 16:08:22,509 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 106 flow. Second operand 7 states and 1623 transitions. [2023-11-17 16:08:22,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 114 transitions, 526 flow [2023-11-17 16:08:22,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 114 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:22,513 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 193 flow [2023-11-17 16:08:22,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-11-17 16:08:22,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-11-17 16:08:22,514 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 193 flow [2023-11-17 16:08:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 220.83333333333334) internal successors, (1325), 6 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:22,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:22,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:22,524 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 16:08:22,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:22,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:22,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1782110852, now seen corresponding path program 2 times [2023-11-17 16:08:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:22,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97823278] [2023-11-17 16:08:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:08:22,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97823278] [2023-11-17 16:08:22,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97823278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:08:22,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:08:22,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:08:22,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570873679] [2023-11-17 16:08:22,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:08:22,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:08:22,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:08:22,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:08:22,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 509 [2023-11-17 16:08:22,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 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 16:08:22,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:22,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 509 [2023-11-17 16:08:22,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:23,621 INFO L124 PetriNetUnfolderBase]: 4227/5655 cut-off events. [2023-11-17 16:08:23,621 INFO L125 PetriNetUnfolderBase]: For 4516/4516 co-relation queries the response was YES. [2023-11-17 16:08:23,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16538 conditions, 5655 events. 4227/5655 cut-off events. For 4516/4516 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23053 event pairs, 501 based on Foata normal form. 152/5074 useless extension candidates. Maximal degree in co-relation 16516. Up to 4027 conditions per place. [2023-11-17 16:08:23,657 INFO L140 encePairwiseOnDemand]: 502/509 looper letters, 83 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2023-11-17 16:08:23,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 538 flow [2023-11-17 16:08:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:08:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:08:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1390 transitions. [2023-11-17 16:08:23,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514079895219384 [2023-11-17 16:08:23,660 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1390 transitions. [2023-11-17 16:08:23,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1390 transitions. [2023-11-17 16:08:23,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:23,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1390 transitions. [2023-11-17 16:08:23,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 231.66666666666666) internal successors, (1390), 6 states have internal predecessors, (1390), 0 states have call successors, (0), 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 16:08:23,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 509.0) internal successors, (3563), 7 states have internal predecessors, (3563), 0 states have call successors, (0), 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 16:08:23,669 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 509.0) internal successors, (3563), 7 states have internal predecessors, (3563), 0 states have call successors, (0), 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 16:08:23,670 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 193 flow. Second operand 6 states and 1390 transitions. [2023-11-17 16:08:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 538 flow [2023-11-17 16:08:23,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 515 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:23,705 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 247 flow [2023-11-17 16:08:23,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-11-17 16:08:23,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2023-11-17 16:08:23,706 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 247 flow [2023-11-17 16:08:23,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 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 16:08:23,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:23,707 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] [2023-11-17 16:08:23,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:08:23,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:23,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1002067457, now seen corresponding path program 1 times [2023-11-17 16:08:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:23,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411068019] [2023-11-17 16:08:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:24,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:24,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411068019] [2023-11-17 16:08:24,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411068019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:24,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162380269] [2023-11-17 16:08:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:24,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:24,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:24,528 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 16:08:24,532 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 16:08:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:24,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:08:24,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:24,955 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 16:08:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:24,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:25,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:25,049 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 25 treesize of output 17 [2023-11-17 16:08:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:25,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162380269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:25,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:25,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 16:08:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669182888] [2023-11-17 16:08:25,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:25,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:08:25,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:08:25,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:08:25,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 509 [2023-11-17 16:08:25,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 247 flow. Second operand has 19 states, 19 states have (on average 178.8421052631579) internal successors, (3398), 19 states have internal predecessors, (3398), 0 states have call successors, (0), 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 16:08:25,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:25,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 509 [2023-11-17 16:08:25,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:28,750 INFO L124 PetriNetUnfolderBase]: 18550/24566 cut-off events. [2023-11-17 16:08:28,751 INFO L125 PetriNetUnfolderBase]: For 25973/25973 co-relation queries the response was YES. [2023-11-17 16:08:28,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72936 conditions, 24566 events. 18550/24566 cut-off events. For 25973/25973 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 120435 event pairs, 1733 based on Foata normal form. 56/21138 useless extension candidates. Maximal degree in co-relation 50221. Up to 6027 conditions per place. [2023-11-17 16:08:29,005 INFO L140 encePairwiseOnDemand]: 497/509 looper letters, 314 selfloop transitions, 75 changer transitions 9/399 dead transitions. [2023-11-17 16:08:29,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 399 transitions, 2358 flow [2023-11-17 16:08:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:08:29,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:08:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4025 transitions. [2023-11-17 16:08:29,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765553372626064 [2023-11-17 16:08:29,018 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4025 transitions. [2023-11-17 16:08:29,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4025 transitions. [2023-11-17 16:08:29,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:29,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4025 transitions. [2023-11-17 16:08:29,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 191.66666666666666) internal successors, (4025), 21 states have internal predecessors, (4025), 0 states have call successors, (0), 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 16:08:29,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 509.0) internal successors, (11198), 22 states have internal predecessors, (11198), 0 states have call successors, (0), 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 16:08:29,045 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 509.0) internal successors, (11198), 22 states have internal predecessors, (11198), 0 states have call successors, (0), 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 16:08:29,046 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 247 flow. Second operand 21 states and 4025 transitions. [2023-11-17 16:08:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 399 transitions, 2358 flow [2023-11-17 16:08:29,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 399 transitions, 2348 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 16:08:29,141 INFO L231 Difference]: Finished difference. Result has 90 places, 131 transitions, 1021 flow [2023-11-17 16:08:29,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1021, PETRI_PLACES=90, PETRI_TRANSITIONS=131} [2023-11-17 16:08:29,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2023-11-17 16:08:29,142 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 131 transitions, 1021 flow [2023-11-17 16:08:29,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 178.8421052631579) internal successors, (3398), 19 states have internal predecessors, (3398), 0 states have call successors, (0), 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 16:08:29,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:29,143 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] [2023-11-17 16:08:29,152 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 16:08:29,349 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 16:08:29,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:29,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:29,351 INFO L85 PathProgramCache]: Analyzing trace with hash 494917301, now seen corresponding path program 2 times [2023-11-17 16:08:29,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:29,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819857093] [2023-11-17 16:08:29,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:29,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:30,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:30,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819857093] [2023-11-17 16:08:30,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819857093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:30,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535301532] [2023-11-17 16:08:30,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:08:30,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:30,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:30,821 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 16:08:30,842 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 16:08:30,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:08:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:30,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 16:08:30,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:31,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:31,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-17 16:08:31,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:08:31,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:08:31,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:08:31,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:08:31,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:08:31,510 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 16:08:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:31,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:31,983 WARN L854 $PredicateComparison]: unable to prove that (forall ((~q1_back~0 Int) (v_ArrVal_204 (Array Int Int)) (v_ArrVal_201 (Array Int Int)) (v_ArrVal_203 (Array Int Int)) (v_ArrVal_202 (Array Int Int))) (let ((.cse0 (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_201) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_202) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_203)) (.cse1 (+ (* ~q1_back~0 4) c_~q1~0.offset))) (or (< 0 (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_204) c_~q1~0.base) .cse1) c_~total~0)) (< c_~n1~0 (+ ~q1_back~0 1)) (< (select (select .cse0 c_~q1~0.base) .cse1) 1) (< ~q1_back~0 0)))) is different from false [2023-11-17 16:08:32,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:32,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2023-11-17 16:08:32,096 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 11411 treesize of output 11123 [2023-11-17 16:08:32,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 199 [2023-11-17 16:08:32,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 187 [2023-11-17 16:08:32,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 254 [2023-11-17 16:08:32,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 161 [2023-11-17 16:08:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:32,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535301532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:32,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:32,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 16:08:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73278352] [2023-11-17 16:08:32,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:32,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:08:32,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:08:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=562, Unknown=6, NotChecked=48, Total=702 [2023-11-17 16:08:32,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 509 [2023-11-17 16:08:32,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 131 transitions, 1021 flow. Second operand has 27 states, 27 states have (on average 164.0) internal successors, (4428), 27 states have internal predecessors, (4428), 0 states have call successors, (0), 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 16:08:32,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:32,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 509 [2023-11-17 16:08:32,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:40,822 INFO L124 PetriNetUnfolderBase]: 43593/58072 cut-off events. [2023-11-17 16:08:40,822 INFO L125 PetriNetUnfolderBase]: For 124845/124845 co-relation queries the response was YES. [2023-11-17 16:08:41,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196756 conditions, 58072 events. 43593/58072 cut-off events. For 124845/124845 co-relation queries the response was YES. Maximal size of possible extension queue 1777. Compared 322697 event pairs, 9401 based on Foata normal form. 921/54742 useless extension candidates. Maximal degree in co-relation 175843. Up to 14893 conditions per place. [2023-11-17 16:08:41,251 INFO L140 encePairwiseOnDemand]: 495/509 looper letters, 426 selfloop transitions, 117 changer transitions 15/559 dead transitions. [2023-11-17 16:08:41,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 559 transitions, 4440 flow [2023-11-17 16:08:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:08:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:08:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5060 transitions. [2023-11-17 16:08:41,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34279520357699345 [2023-11-17 16:08:41,265 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5060 transitions. [2023-11-17 16:08:41,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5060 transitions. [2023-11-17 16:08:41,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:41,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5060 transitions. [2023-11-17 16:08:41,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 174.48275862068965) internal successors, (5060), 29 states have internal predecessors, (5060), 0 states have call successors, (0), 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 16:08:41,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 509.0) internal successors, (15270), 30 states have internal predecessors, (15270), 0 states have call successors, (0), 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 16:08:41,313 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 509.0) internal successors, (15270), 30 states have internal predecessors, (15270), 0 states have call successors, (0), 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 16:08:41,313 INFO L175 Difference]: Start difference. First operand has 90 places, 131 transitions, 1021 flow. Second operand 29 states and 5060 transitions. [2023-11-17 16:08:41,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 559 transitions, 4440 flow [2023-11-17 16:08:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 559 transitions, 4359 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-17 16:08:41,827 INFO L231 Difference]: Finished difference. Result has 132 places, 226 transitions, 2236 flow [2023-11-17 16:08:41,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2236, PETRI_PLACES=132, PETRI_TRANSITIONS=226} [2023-11-17 16:08:41,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2023-11-17 16:08:41,828 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 226 transitions, 2236 flow [2023-11-17 16:08:41,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 164.0) internal successors, (4428), 27 states have internal predecessors, (4428), 0 states have call successors, (0), 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 16:08:41,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:41,829 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] [2023-11-17 16:08:41,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:08:42,035 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 16:08:42,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:42,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1294537354, now seen corresponding path program 3 times [2023-11-17 16:08:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:42,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248280350] [2023-11-17 16:08:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:42,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:43,070 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 16:08:43,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:43,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248280350] [2023-11-17 16:08:43,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248280350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:43,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216776306] [2023-11-17 16:08:43,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:08:43,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:43,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:43,073 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 16:08:43,080 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 16:08:43,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:08:43,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:43,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:08:43,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:43,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:43,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 82 [2023-11-17 16:08:43,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:08:43,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:08:43,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:08:43,516 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 23 treesize of output 7 [2023-11-17 16:08:43,529 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 16:08:43,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:43,612 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 (Array Int Int)) (v_ArrVal_257 (Array Int Int))) (< 0 (+ c_~total~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_257) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_258) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-11-17 16:08:43,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:08:43,627 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 173 treesize of output 157 [2023-11-17 16:08:43,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-11-17 16:08:43,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-17 16:08:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-17 16:08:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216776306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:43,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-17 16:08:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148777065] [2023-11-17 16:08:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:43,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:08:43,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:08:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=390, Unknown=6, NotChecked=40, Total=506 [2023-11-17 16:08:43,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 509 [2023-11-17 16:08:43,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 226 transitions, 2236 flow. Second operand has 23 states, 23 states have (on average 170.17391304347825) internal successors, (3914), 23 states have internal predecessors, (3914), 0 states have call successors, (0), 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 16:08:43,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:43,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 509 [2023-11-17 16:08:43,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:53,514 INFO L124 PetriNetUnfolderBase]: 60403/80586 cut-off events. [2023-11-17 16:08:53,515 INFO L125 PetriNetUnfolderBase]: For 261699/261699 co-relation queries the response was YES. [2023-11-17 16:08:54,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302335 conditions, 80586 events. 60403/80586 cut-off events. For 261699/261699 co-relation queries the response was YES. Maximal size of possible extension queue 2465. Compared 468806 event pairs, 12835 based on Foata normal form. 110/80695 useless extension candidates. Maximal degree in co-relation 299831. Up to 39749 conditions per place. [2023-11-17 16:08:54,286 INFO L140 encePairwiseOnDemand]: 500/509 looper letters, 288 selfloop transitions, 133 changer transitions 1/423 dead transitions. [2023-11-17 16:08:54,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 423 transitions, 4587 flow [2023-11-17 16:08:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:08:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:08:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2327 transitions. [2023-11-17 16:08:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3516699410609037 [2023-11-17 16:08:54,293 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2327 transitions. [2023-11-17 16:08:54,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2327 transitions. [2023-11-17 16:08:54,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:54,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2327 transitions. [2023-11-17 16:08:54,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 179.0) internal successors, (2327), 13 states have internal predecessors, (2327), 0 states have call successors, (0), 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 16:08:54,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 509.0) internal successors, (7126), 14 states have internal predecessors, (7126), 0 states have call successors, (0), 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 16:08:54,306 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 509.0) internal successors, (7126), 14 states have internal predecessors, (7126), 0 states have call successors, (0), 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 16:08:54,307 INFO L175 Difference]: Start difference. First operand has 132 places, 226 transitions, 2236 flow. Second operand 13 states and 2327 transitions. [2023-11-17 16:08:54,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 423 transitions, 4587 flow [2023-11-17 16:08:58,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 423 transitions, 4417 flow, removed 66 selfloop flow, removed 8 redundant places. [2023-11-17 16:08:58,598 INFO L231 Difference]: Finished difference. Result has 137 places, 288 transitions, 3133 flow [2023-11-17 16:08:58,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=509, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3133, PETRI_PLACES=137, PETRI_TRANSITIONS=288} [2023-11-17 16:08:58,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2023-11-17 16:08:58,599 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 288 transitions, 3133 flow [2023-11-17 16:08:58,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 170.17391304347825) internal successors, (3914), 23 states have internal predecessors, (3914), 0 states have call successors, (0), 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 16:08:58,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:58,600 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] [2023-11-17 16:08:58,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:08:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:58,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:08:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1269238254, now seen corresponding path program 4 times [2023-11-17 16:08:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28479968] [2023-11-17 16:08:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:59,945 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 16:08:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:59,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28479968] [2023-11-17 16:08:59,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28479968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370708051] [2023-11-17 16:08:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:08:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:59,948 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 16:08:59,950 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 16:09:00,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:09:00,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:00,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:09:00,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:00,136 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:09:00,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 231 [2023-11-17 16:09:00,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:09:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:09:00,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:09:00,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:09:00,823 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 25 treesize of output 7 [2023-11-17 16:09:00,833 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 16:09:00,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:01,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:09:01,162 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 681 treesize of output 649 [2023-11-17 16:09:01,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 67 [2023-11-17 16:09:01,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 122 [2023-11-17 16:09:01,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-11-17 16:09:01,529 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 16:09:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370708051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:01,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:01,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-17 16:09:01,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451529062] [2023-11-17 16:09:01,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:01,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 16:09:01,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 16:09:01,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=633, Unknown=5, NotChecked=0, Total=756 [2023-11-17 16:09:01,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 509 [2023-11-17 16:09:01,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 288 transitions, 3133 flow. Second operand has 28 states, 28 states have (on average 167.0) internal successors, (4676), 28 states have internal predecessors, (4676), 0 states have call successors, (0), 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 16:09:01,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:01,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 509 [2023-11-17 16:09:01,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:09:05,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:09:37,118 INFO L124 PetriNetUnfolderBase]: 196172/260840 cut-off events. [2023-11-17 16:09:37,118 INFO L125 PetriNetUnfolderBase]: For 963034/963034 co-relation queries the response was YES. [2023-11-17 16:09:39,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027494 conditions, 260840 events. 196172/260840 cut-off events. For 963034/963034 co-relation queries the response was YES. Maximal size of possible extension queue 7531. Compared 1718052 event pairs, 31332 based on Foata normal form. 9/260789 useless extension candidates. Maximal degree in co-relation 1025024. Up to 70229 conditions per place. [2023-11-17 16:09:40,315 INFO L140 encePairwiseOnDemand]: 498/509 looper letters, 570 selfloop transitions, 544 changer transitions 5/1120 dead transitions. [2023-11-17 16:09:40,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1120 transitions, 13121 flow [2023-11-17 16:09:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:09:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:09:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4653 transitions. [2023-11-17 16:09:40,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515943781169714 [2023-11-17 16:09:40,346 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4653 transitions. [2023-11-17 16:09:40,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4653 transitions. [2023-11-17 16:09:40,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:09:40,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4653 transitions. [2023-11-17 16:09:40,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 178.96153846153845) internal successors, (4653), 26 states have internal predecessors, (4653), 0 states have call successors, (0), 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 16:09:40,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 509.0) internal successors, (13743), 27 states have internal predecessors, (13743), 0 states have call successors, (0), 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 16:09:40,534 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 509.0) internal successors, (13743), 27 states have internal predecessors, (13743), 0 states have call successors, (0), 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 16:09:40,534 INFO L175 Difference]: Start difference. First operand has 137 places, 288 transitions, 3133 flow. Second operand 26 states and 4653 transitions. [2023-11-17 16:09:40,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1120 transitions, 13121 flow