/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 03:31:34,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 03:31:34,078 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 03:31:34,083 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 03:31:34,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 03:31:34,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 03:31:34,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 03:31:34,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 03:31:34,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 03:31:34,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 03:31:34,109 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 03:31:34,109 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 03:31:34,110 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 03:31:34,110 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 03:31:34,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 03:31:34,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 03:31:34,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 03:31:34,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 03:31:34,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 03:31:34,111 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 03:31:34,112 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 03:31:34,112 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 03:31:34,112 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 03:31:34,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 03:31:34,113 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 03:31:34,113 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 03:31:34,113 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 03:31:34,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:31:34,113 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 03:31:34,114 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 03:31:34,114 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 03:31:34,114 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 03:31:34,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 03:31:34,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 03:31:34,115 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 03:31:34,115 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 03:31:34,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 03:31:34,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 03:31:34,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 03:31:34,379 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 03:31:34,379 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 03:31:34,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-24 03:31:35,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 03:31:35,489 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 03:31:35,489 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2023-08-24 03:31:35,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf87fba9/4ad6a0c475a043f4832da03e400cf503/FLAG175043998 [2023-08-24 03:31:35,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf87fba9/4ad6a0c475a043f4832da03e400cf503 [2023-08-24 03:31:35,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 03:31:35,507 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 03:31:35,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 03:31:35,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 03:31:35,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 03:31:35,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,510 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5141e514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35, skipping insertion in model container [2023-08-24 03:31:35,510 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,526 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 03:31:35,628 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-queue-add-3.wvr.c[3412,3425] [2023-08-24 03:31:35,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:31:35,637 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 03:31:35,651 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-queue-add-3.wvr.c[3412,3425] [2023-08-24 03:31:35,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:31:35,658 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:31:35,658 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:31:35,663 INFO L206 MainTranslator]: Completed translation [2023-08-24 03:31:35,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35 WrapperNode [2023-08-24 03:31:35,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 03:31:35,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 03:31:35,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 03:31:35,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 03:31:35,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,689 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 255 [2023-08-24 03:31:35,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 03:31:35,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 03:31:35,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 03:31:35,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 03:31:35,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,698 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,698 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,702 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,705 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,706 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,707 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,709 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 03:31:35,710 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 03:31:35,710 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 03:31:35,710 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 03:31:35,710 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (1/1) ... [2023-08-24 03:31:35,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:31:35,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:35,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 03:31:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 03:31:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 03:31:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 03:31:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 03:31:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 03:31:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 03:31:35,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 03:31:35,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 03:31:35,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 03:31:35,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 03:31:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 03:31:35,765 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 03:31:35,852 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 03:31:35,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 03:31:36,173 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 03:31:36,238 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 03:31:36,238 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 03:31:36,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:31:36 BoogieIcfgContainer [2023-08-24 03:31:36,240 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 03:31:36,241 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 03:31:36,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 03:31:36,273 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 03:31:36,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:31:35" (1/3) ... [2023-08-24 03:31:36,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0a2401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:31:36, skipping insertion in model container [2023-08-24 03:31:36,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:31:35" (2/3) ... [2023-08-24 03:31:36,280 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0a2401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:31:36, skipping insertion in model container [2023-08-24 03:31:36,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:31:36" (3/3) ... [2023-08-24 03:31:36,281 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-08-24 03:31:36,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 03:31:36,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 03:31:36,292 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 03:31:36,349 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 03:31:36,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 204 transitions, 432 flow [2023-08-24 03:31:36,455 INFO L124 PetriNetUnfolderBase]: 18/201 cut-off events. [2023-08-24 03:31:36,455 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:31:36,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 116 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2023-08-24 03:31:36,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 204 transitions, 432 flow [2023-08-24 03:31:36,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 191 transitions, 400 flow [2023-08-24 03:31:36,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 03:31:36,481 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 191 transitions, 400 flow [2023-08-24 03:31:36,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 191 transitions, 400 flow [2023-08-24 03:31:36,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 191 transitions, 400 flow [2023-08-24 03:31:36,528 INFO L124 PetriNetUnfolderBase]: 18/191 cut-off events. [2023-08-24 03:31:36,529 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:31:36,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 18/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2023-08-24 03:31:36,532 INFO L119 LiptonReduction]: Number of co-enabled transitions 1528 [2023-08-24 03:31:42,726 INFO L134 LiptonReduction]: Checked pairs total: 2398 [2023-08-24 03:31:42,726 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-24 03:31:42,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 03:31:42,739 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@725cb315, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 03:31:42,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 03:31:42,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 03:31:42,745 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 03:31:42,745 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 03:31:42,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:42,745 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] [2023-08-24 03:31:42,746 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 1 more)] === [2023-08-24 03:31:42,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:42,749 INFO L85 PathProgramCache]: Analyzing trace with hash -916911970, now seen corresponding path program 1 times [2023-08-24 03:31:42,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:42,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917056626] [2023-08-24 03:31:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:42,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:42,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917056626] [2023-08-24 03:31:42,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917056626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:31:42,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:31:42,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 03:31:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306196370] [2023-08-24 03:31:42,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:31:42,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 03:31:42,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:42,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 03:31:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 03:31:42,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 407 [2023-08-24 03:31:42,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:42,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:42,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 407 [2023-08-24 03:31:42,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:43,055 INFO L124 PetriNetUnfolderBase]: 324/461 cut-off events. [2023-08-24 03:31:43,055 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-24 03:31:43,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 461 events. 324/461 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1469 event pairs, 167 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 739. Up to 453 conditions per place. [2023-08-24 03:31:43,061 INFO L140 encePairwiseOnDemand]: 406/407 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-24 03:31:43,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-08-24 03:31:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 03:31:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 03:31:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 383 transitions. [2023-08-24 03:31:43,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705159705159705 [2023-08-24 03:31:43,078 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 383 transitions. [2023-08-24 03:31:43,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 383 transitions. [2023-08-24 03:31:43,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:43,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 383 transitions. [2023-08-24 03:31:43,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,089 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,090 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 383 transitions. [2023-08-24 03:31:43,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-08-24 03:31:43,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 03:31:43,093 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-08-24 03:31:43,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 03:31:43,097 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-24 03:31:43,097 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-08-24 03:31:43,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:43,097 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] [2023-08-24 03:31:43,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 03:31:43,098 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 1 more)] === [2023-08-24 03:31:43,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:43,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1440471924, now seen corresponding path program 1 times [2023-08-24 03:31:43,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:43,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004949896] [2023-08-24 03:31:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:43,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:43,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:43,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004949896] [2023-08-24 03:31:43,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004949896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:31:43,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:31:43,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:31:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742564617] [2023-08-24 03:31:43,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:31:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:31:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:31:43,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:31:43,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 407 [2023-08-24 03:31:43,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:43,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 407 [2023-08-24 03:31:43,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:43,403 INFO L124 PetriNetUnfolderBase]: 326/478 cut-off events. [2023-08-24 03:31:43,403 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 03:31:43,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1516 event pairs, 167 based on Foata normal form. 14/335 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2023-08-24 03:31:43,405 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-08-24 03:31:43,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2023-08-24 03:31:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:31:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:31:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2023-08-24 03:31:43,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974201474201474 [2023-08-24 03:31:43,407 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2023-08-24 03:31:43,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2023-08-24 03:31:43,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:43,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2023-08-24 03:31:43,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,412 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 647 transitions. [2023-08-24 03:31:43,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2023-08-24 03:31:43,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 03:31:43,413 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-08-24 03:31:43,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-24 03:31:43,413 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-24 03:31:43,413 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-08-24 03:31:43,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:43,414 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] [2023-08-24 03:31:43,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 03:31:43,414 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 1 more)] === [2023-08-24 03:31:43,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -440302611, now seen corresponding path program 1 times [2023-08-24 03:31:43,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:43,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826380363] [2023-08-24 03:31:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:43,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:43,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:43,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826380363] [2023-08-24 03:31:43,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826380363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:31:43,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:31:43,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 03:31:43,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288281065] [2023-08-24 03:31:43,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:31:43,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:31:43,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:31:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:31:43,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 407 [2023-08-24 03:31:43,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:43,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 407 [2023-08-24 03:31:43,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:43,586 INFO L124 PetriNetUnfolderBase]: 368/550 cut-off events. [2023-08-24 03:31:43,586 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-24 03:31:43,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 550 events. 368/550 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1952 event pairs, 194 based on Foata normal form. 30/405 useless extension candidates. Maximal degree in co-relation 1340. Up to 450 conditions per place. [2023-08-24 03:31:43,589 INFO L140 encePairwiseOnDemand]: 400/407 looper letters, 24 selfloop transitions, 2 changer transitions 12/41 dead transitions. [2023-08-24 03:31:43,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 190 flow [2023-08-24 03:31:43,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:31:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:31:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-24 03:31:43,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39864864864864863 [2023-08-24 03:31:43,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-24 03:31:43,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-24 03:31:43,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:43,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-24 03:31:43,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,596 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 649 transitions. [2023-08-24 03:31:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 190 flow [2023-08-24 03:31:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 03:31:43,598 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-08-24 03:31:43,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-24 03:31:43,599 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-24 03:31:43,601 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-08-24 03:31:43,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:43,602 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] [2023-08-24 03:31:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 03:31:43,603 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 1 more)] === [2023-08-24 03:31:43,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1562229968, now seen corresponding path program 1 times [2023-08-24 03:31:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090866828] [2023-08-24 03:31:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:31:43,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090866828] [2023-08-24 03:31:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090866828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:31:43,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:31:43,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 03:31:43,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224880035] [2023-08-24 03:31:43,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:31:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 03:31:43,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 03:31:43,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 03:31:43,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 03:31:43,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:43,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 03:31:43,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:43,814 INFO L124 PetriNetUnfolderBase]: 340/485 cut-off events. [2023-08-24 03:31:43,814 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-24 03:31:43,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 485 events. 340/485 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1427 event pairs, 48 based on Foata normal form. 16/334 useless extension candidates. Maximal degree in co-relation 1358. Up to 390 conditions per place. [2023-08-24 03:31:43,817 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-24 03:31:43,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 198 flow [2023-08-24 03:31:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 03:31:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 03:31:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-24 03:31:43,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2023-08-24 03:31:43,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-24 03:31:43,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-24 03:31:43,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:43,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-24 03:31:43,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,823 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 3 states and 561 transitions. [2023-08-24 03:31:43,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 198 flow [2023-08-24 03:31:43,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 194 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 03:31:43,824 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-08-24 03:31:43,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-24 03:31:43,826 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-24 03:31:43,826 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-08-24 03:31:43,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:43,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:43,826 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] [2023-08-24 03:31:43,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 03:31:43,827 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 1 more)] === [2023-08-24 03:31:43,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash -131196208, now seen corresponding path program 2 times [2023-08-24 03:31:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032925655] [2023-08-24 03:31:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:31:44,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:44,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032925655] [2023-08-24 03:31:44,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032925655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:31:44,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:31:44,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 03:31:44,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750453550] [2023-08-24 03:31:44,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:31:44,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:31:44,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:31:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 03:31:44,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 407 [2023-08-24 03:31:44,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 170.14285714285714) internal successors, (1191), 7 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:44,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 407 [2023-08-24 03:31:44,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:44,239 INFO L124 PetriNetUnfolderBase]: 499/751 cut-off events. [2023-08-24 03:31:44,240 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-08-24 03:31:44,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 751 events. 499/751 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2713 event pairs, 85 based on Foata normal form. 1/531 useless extension candidates. Maximal degree in co-relation 2392. Up to 302 conditions per place. [2023-08-24 03:31:44,243 INFO L140 encePairwiseOnDemand]: 400/407 looper letters, 65 selfloop transitions, 8 changer transitions 2/77 dead transitions. [2023-08-24 03:31:44,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 77 transitions, 449 flow [2023-08-24 03:31:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:31:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:31:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1070 transitions. [2023-08-24 03:31:44,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381654381654382 [2023-08-24 03:31:44,246 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1070 transitions. [2023-08-24 03:31:44,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1070 transitions. [2023-08-24 03:31:44,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:44,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1070 transitions. [2023-08-24 03:31:44,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.33333333333334) internal successors, (1070), 6 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,252 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,252 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 6 states and 1070 transitions. [2023-08-24 03:31:44,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 77 transitions, 449 flow [2023-08-24 03:31:44,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 77 transitions, 398 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-08-24 03:31:44,255 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 158 flow [2023-08-24 03:31:44,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-08-24 03:31:44,255 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2023-08-24 03:31:44,255 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 158 flow [2023-08-24 03:31:44,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 170.14285714285714) internal successors, (1191), 7 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:44,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:31:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 03:31:44,256 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 1 more)] === [2023-08-24 03:31:44,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1545366994, now seen corresponding path program 1 times [2023-08-24 03:31:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:44,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253956520] [2023-08-24 03:31:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:44,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:44,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253956520] [2023-08-24 03:31:44,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253956520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:31:44,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372809795] [2023-08-24 03:31:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:44,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:44,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:44,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:31:44,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 03:31:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:44,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:31:44,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:31:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:44,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:31:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:44,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372809795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:31:44,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:31:44,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 03:31:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631000466] [2023-08-24 03:31:44,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:31:44,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 03:31:44,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 03:31:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 03:31:44,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 407 [2023-08-24 03:31:44,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 158 flow. Second operand has 12 states, 12 states have (on average 152.83333333333334) internal successors, (1834), 12 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:44,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 407 [2023-08-24 03:31:44,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:44,845 INFO L124 PetriNetUnfolderBase]: 681/1073 cut-off events. [2023-08-24 03:31:44,846 INFO L125 PetriNetUnfolderBase]: For 1230/1283 co-relation queries the response was YES. [2023-08-24 03:31:44,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3388 conditions, 1073 events. 681/1073 cut-off events. For 1230/1283 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4569 event pairs, 291 based on Foata normal form. 137/1047 useless extension candidates. Maximal degree in co-relation 3377. Up to 645 conditions per place. [2023-08-24 03:31:44,852 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 59 selfloop transitions, 5 changer transitions 4/72 dead transitions. [2023-08-24 03:31:44,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 432 flow [2023-08-24 03:31:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:31:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:31:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 956 transitions. [2023-08-24 03:31:44,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914823914823915 [2023-08-24 03:31:44,855 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 956 transitions. [2023-08-24 03:31:44,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 956 transitions. [2023-08-24 03:31:44,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:44,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 956 transitions. [2023-08-24 03:31:44,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,860 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,861 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 158 flow. Second operand 6 states and 956 transitions. [2023-08-24 03:31:44,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 432 flow [2023-08-24 03:31:44,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 425 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 03:31:44,863 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 206 flow [2023-08-24 03:31:44,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=206, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-24 03:31:44,863 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2023-08-24 03:31:44,864 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 206 flow [2023-08-24 03:31:44,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.83333333333334) internal successors, (1834), 12 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:44,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:44,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:31:44,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 03:31:45,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 03:31:45,076 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 1 more)] === [2023-08-24 03:31:45,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1768308083, now seen corresponding path program 1 times [2023-08-24 03:31:45,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:45,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925669478] [2023-08-24 03:31:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:31:45,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925669478] [2023-08-24 03:31:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925669478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:31:45,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:31:45,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:31:45,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548595558] [2023-08-24 03:31:45,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:31:45,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:31:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:31:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:31:45,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 03:31:45,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:45,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:45,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 03:31:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:45,408 INFO L124 PetriNetUnfolderBase]: 1125/1812 cut-off events. [2023-08-24 03:31:45,408 INFO L125 PetriNetUnfolderBase]: For 2737/2791 co-relation queries the response was YES. [2023-08-24 03:31:45,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6233 conditions, 1812 events. 1125/1812 cut-off events. For 2737/2791 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8948 event pairs, 206 based on Foata normal form. 134/1653 useless extension candidates. Maximal degree in co-relation 6218. Up to 793 conditions per place. [2023-08-24 03:31:45,417 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 61 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-08-24 03:31:45,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 535 flow [2023-08-24 03:31:45,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:31:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:31:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 756 transitions. [2023-08-24 03:31:45,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643734643734644 [2023-08-24 03:31:45,419 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 756 transitions. [2023-08-24 03:31:45,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 756 transitions. [2023-08-24 03:31:45,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:45,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 756 transitions. [2023-08-24 03:31:45,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:45,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:45,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:45,423 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 206 flow. Second operand 4 states and 756 transitions. [2023-08-24 03:31:45,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 535 flow [2023-08-24 03:31:45,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 511 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-24 03:31:45,426 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 300 flow [2023-08-24 03:31:45,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-24 03:31:45,426 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2023-08-24 03:31:45,426 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 300 flow [2023-08-24 03:31:45,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 180.5) internal successors, (722), 4 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:45,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:45,427 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] [2023-08-24 03:31:45,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 03:31:45,427 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 1 more)] === [2023-08-24 03:31:45,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash 254367061, now seen corresponding path program 2 times [2023-08-24 03:31:45,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:45,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506485317] [2023-08-24 03:31:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:45,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506485317] [2023-08-24 03:31:45,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506485317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:31:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312433409] [2023-08-24 03:31:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:31:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:45,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:31:45,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 03:31:46,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:31:46,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:31:46,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:31:46,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:31:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:31:46,318 INFO L351 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 18 treesize of output 20 [2023-08-24 03:31:46,362 INFO L351 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 11 treesize of output 3 [2023-08-24 03:31:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:46,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:31:46,531 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:31:46,532 INFO L351 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 45 treesize of output 37 [2023-08-24 03:31:46,537 INFO L351 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 24 treesize of output 18 [2023-08-24 03:31:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:46,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312433409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:31:46,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:31:46,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 03:31:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651702978] [2023-08-24 03:31:46,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:31:46,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:31:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:31:46,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:31:46,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 407 [2023-08-24 03:31:46,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 300 flow. Second operand has 25 states, 25 states have (on average 128.32) internal successors, (3208), 25 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:46,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:46,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 407 [2023-08-24 03:31:46,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:49,984 INFO L124 PetriNetUnfolderBase]: 5392/8993 cut-off events. [2023-08-24 03:31:49,984 INFO L125 PetriNetUnfolderBase]: For 18327/18463 co-relation queries the response was YES. [2023-08-24 03:31:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36769 conditions, 8993 events. 5392/8993 cut-off events. For 18327/18463 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 61499 event pairs, 516 based on Foata normal form. 140/7722 useless extension candidates. Maximal degree in co-relation 36752. Up to 3518 conditions per place. [2023-08-24 03:31:50,045 INFO L140 encePairwiseOnDemand]: 393/407 looper letters, 455 selfloop transitions, 136 changer transitions 15/609 dead transitions. [2023-08-24 03:31:50,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 609 transitions, 4636 flow [2023-08-24 03:31:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 03:31:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 03:31:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5623 transitions. [2023-08-24 03:31:50,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3369688979445077 [2023-08-24 03:31:50,058 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5623 transitions. [2023-08-24 03:31:50,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5623 transitions. [2023-08-24 03:31:50,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:50,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5623 transitions. [2023-08-24 03:31:50,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 137.14634146341464) internal successors, (5623), 41 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:50,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 407.0) internal successors, (17094), 42 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:50,089 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 407.0) internal successors, (17094), 42 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:50,089 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 300 flow. Second operand 41 states and 5623 transitions. [2023-08-24 03:31:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 609 transitions, 4636 flow [2023-08-24 03:31:50,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 609 transitions, 4348 flow, removed 143 selfloop flow, removed 1 redundant places. [2023-08-24 03:31:50,111 INFO L231 Difference]: Finished difference. Result has 106 places, 222 transitions, 1815 flow [2023-08-24 03:31:50,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1815, PETRI_PLACES=106, PETRI_TRANSITIONS=222} [2023-08-24 03:31:50,113 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 74 predicate places. [2023-08-24 03:31:50,113 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 222 transitions, 1815 flow [2023-08-24 03:31:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 128.32) internal successors, (3208), 25 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:50,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:50,114 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] [2023-08-24 03:31:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 03:31:50,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-24 03:31:50,319 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:31:50,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2056499949, now seen corresponding path program 3 times [2023-08-24 03:31:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:50,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625681429] [2023-08-24 03:31:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:50,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:50,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625681429] [2023-08-24 03:31:50,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625681429] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:31:50,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951633758] [2023-08-24 03:31:50,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:31:50,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:50,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:31:50,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 03:31:51,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:31:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:31:51,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 03:31:51,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:31:51,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:31:51,313 INFO L351 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 16 treesize of output 18 [2023-08-24 03:31:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:51,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:31:51,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:31:51,446 INFO L351 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 45 treesize of output 37 [2023-08-24 03:31:51,450 INFO L351 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 24 treesize of output 18 [2023-08-24 03:31:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:51,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951633758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:31:51,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:31:51,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-24 03:31:51,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153185477] [2023-08-24 03:31:51,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:31:51,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:31:51,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:31:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=547, Unknown=2, NotChecked=0, Total=650 [2023-08-24 03:31:51,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 407 [2023-08-24 03:31:51,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 222 transitions, 1815 flow. Second operand has 26 states, 26 states have (on average 128.03846153846155) internal successors, (3329), 26 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:51,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:51,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 407 [2023-08-24 03:31:51,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:53,506 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_312 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_312) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) (not (= |c_thread2Thread1of1ForFork2_~j~0#1| 0))) is different from false [2023-08-24 03:31:56,657 INFO L124 PetriNetUnfolderBase]: 18725/29041 cut-off events. [2023-08-24 03:31:56,657 INFO L125 PetriNetUnfolderBase]: For 128805/128952 co-relation queries the response was YES. [2023-08-24 03:31:56,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136822 conditions, 29041 events. 18725/29041 cut-off events. For 128805/128952 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 213927 event pairs, 2096 based on Foata normal form. 1333/27370 useless extension candidates. Maximal degree in co-relation 136790. Up to 10552 conditions per place. [2023-08-24 03:31:56,857 INFO L140 encePairwiseOnDemand]: 389/407 looper letters, 925 selfloop transitions, 424 changer transitions 0/1352 dead transitions. [2023-08-24 03:31:56,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 1352 transitions, 13536 flow [2023-08-24 03:31:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 03:31:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 03:31:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5544 transitions. [2023-08-24 03:31:56,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33223467369808835 [2023-08-24 03:31:56,867 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5544 transitions. [2023-08-24 03:31:56,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5544 transitions. [2023-08-24 03:31:56,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:56,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5544 transitions. [2023-08-24 03:31:56,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 135.21951219512195) internal successors, (5544), 41 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:56,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 407.0) internal successors, (17094), 42 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:56,901 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 407.0) internal successors, (17094), 42 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:56,901 INFO L175 Difference]: Start difference. First operand has 106 places, 222 transitions, 1815 flow. Second operand 41 states and 5544 transitions. [2023-08-24 03:31:56,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 1352 transitions, 13536 flow [2023-08-24 03:31:57,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 1352 transitions, 11516 flow, removed 1005 selfloop flow, removed 5 redundant places. [2023-08-24 03:31:57,741 INFO L231 Difference]: Finished difference. Result has 166 places, 638 transitions, 6265 flow [2023-08-24 03:31:57,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6265, PETRI_PLACES=166, PETRI_TRANSITIONS=638} [2023-08-24 03:31:57,741 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 134 predicate places. [2023-08-24 03:31:57,741 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 638 transitions, 6265 flow [2023-08-24 03:31:57,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 128.03846153846155) internal successors, (3329), 26 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:57,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:57,742 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] [2023-08-24 03:31:57,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 03:31:57,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:57,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:31:57,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666315, now seen corresponding path program 4 times [2023-08-24 03:31:57,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:57,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351178547] [2023-08-24 03:31:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:57,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:58,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351178547] [2023-08-24 03:31:58,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351178547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:31:58,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997262829] [2023-08-24 03:31:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:31:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:58,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:31:58,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 03:31:58,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:31:58,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:31:58,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 03:31:58,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:31:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:31:58,929 INFO L351 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 44 treesize of output 42 [2023-08-24 03:31:59,098 INFO L351 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 18 treesize of output 20 [2023-08-24 03:31:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:31:59,176 INFO L351 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 18 treesize of output 20 [2023-08-24 03:31:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:59,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:31:59,268 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_373 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_373) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-24 03:31:59,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:31:59,363 INFO L351 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 85 treesize of output 77 [2023-08-24 03:31:59,369 INFO L351 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 64 treesize of output 52 [2023-08-24 03:31:59,375 INFO L351 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 52 treesize of output 46 [2023-08-24 03:31:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:59,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997262829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:31:59,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:31:59,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-08-24 03:31:59,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963601689] [2023-08-24 03:31:59,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:31:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:31:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:31:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=698, Unknown=2, NotChecked=54, Total=870 [2023-08-24 03:31:59,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 407 [2023-08-24 03:31:59,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 638 transitions, 6265 flow. Second operand has 30 states, 30 states have (on average 120.93333333333334) internal successors, (3628), 30 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:59,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:59,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 407 [2023-08-24 03:31:59,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:32:09,967 INFO L124 PetriNetUnfolderBase]: 32462/50284 cut-off events. [2023-08-24 03:32:09,968 INFO L125 PetriNetUnfolderBase]: For 553498/553700 co-relation queries the response was YES. [2023-08-24 03:32:10,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304743 conditions, 50284 events. 32462/50284 cut-off events. For 553498/553700 co-relation queries the response was YES. Maximal size of possible extension queue 3143. Compared 401441 event pairs, 3725 based on Foata normal form. 613/49585 useless extension candidates. Maximal degree in co-relation 304689. Up to 22747 conditions per place. [2023-08-24 03:32:10,750 INFO L140 encePairwiseOnDemand]: 388/407 looper letters, 732 selfloop transitions, 875 changer transitions 1/1611 dead transitions. [2023-08-24 03:32:10,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 1611 transitions, 19487 flow [2023-08-24 03:32:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 03:32:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 03:32:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5236 transitions. [2023-08-24 03:32:10,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3137771918259723 [2023-08-24 03:32:10,761 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5236 transitions. [2023-08-24 03:32:10,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5236 transitions. [2023-08-24 03:32:10,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:32:10,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5236 transitions. [2023-08-24 03:32:10,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 127.70731707317073) internal successors, (5236), 41 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:10,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 407.0) internal successors, (17094), 42 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:10,788 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 407.0) internal successors, (17094), 42 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:10,788 INFO L175 Difference]: Start difference. First operand has 166 places, 638 transitions, 6265 flow. Second operand 41 states and 5236 transitions. [2023-08-24 03:32:10,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 1611 transitions, 19487 flow [2023-08-24 03:32:19,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 1611 transitions, 19123 flow, removed 168 selfloop flow, removed 8 redundant places. [2023-08-24 03:32:19,871 INFO L231 Difference]: Finished difference. Result has 223 places, 1233 transitions, 16185 flow [2023-08-24 03:32:19,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=16185, PETRI_PLACES=223, PETRI_TRANSITIONS=1233} [2023-08-24 03:32:19,871 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 191 predicate places. [2023-08-24 03:32:19,871 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 1233 transitions, 16185 flow [2023-08-24 03:32:19,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 120.93333333333334) internal successors, (3628), 30 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:19,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:32:19,872 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:32:19,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 03:32:20,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:32:20,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:32:20,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:32:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1183976826, now seen corresponding path program 5 times [2023-08-24 03:32:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:32:20,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512178404] [2023-08-24 03:32:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:32:20,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:32:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:32:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:32:20,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:32:20,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512178404] [2023-08-24 03:32:20,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512178404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:32:20,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472598537] [2023-08-24 03:32:20,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:32:20,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:32:20,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:32:20,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:32:20,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 03:32:20,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:32:20,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:32:20,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 03:32:20,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:32:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 03:32:20,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:32:20,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472598537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:32:20,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:32:20,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2023-08-24 03:32:20,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276363903] [2023-08-24 03:32:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:32:20,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 03:32:20,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:32:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 03:32:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-24 03:32:20,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 407 [2023-08-24 03:32:20,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 1233 transitions, 16185 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:20,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:32:20,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 407 [2023-08-24 03:32:20,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:32:31,751 INFO L124 PetriNetUnfolderBase]: 28499/44275 cut-off events. [2023-08-24 03:32:31,751 INFO L125 PetriNetUnfolderBase]: For 807667/807689 co-relation queries the response was YES. [2023-08-24 03:32:32,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358909 conditions, 44275 events. 28499/44275 cut-off events. For 807667/807689 co-relation queries the response was YES. Maximal size of possible extension queue 2736. Compared 348063 event pairs, 9708 based on Foata normal form. 38/43999 useless extension candidates. Maximal degree in co-relation 358830. Up to 41516 conditions per place. [2023-08-24 03:32:32,353 INFO L140 encePairwiseOnDemand]: 400/407 looper letters, 1140 selfloop transitions, 86 changer transitions 0/1228 dead transitions. [2023-08-24 03:32:32,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 1228 transitions, 18471 flow [2023-08-24 03:32:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 03:32:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 03:32:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 852 transitions. [2023-08-24 03:32:32,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41867321867321866 [2023-08-24 03:32:32,355 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 852 transitions. [2023-08-24 03:32:32,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 852 transitions. [2023-08-24 03:32:32,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:32:32,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 852 transitions. [2023-08-24 03:32:32,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.4) internal successors, (852), 5 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:32,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:32,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:32,358 INFO L175 Difference]: Start difference. First operand has 223 places, 1233 transitions, 16185 flow. Second operand 5 states and 852 transitions. [2023-08-24 03:32:32,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 1228 transitions, 18471 flow [2023-08-24 03:32:44,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1228 transitions, 17494 flow, removed 452 selfloop flow, removed 14 redundant places. [2023-08-24 03:32:44,329 INFO L231 Difference]: Finished difference. Result has 212 places, 1132 transitions, 14251 flow [2023-08-24 03:32:44,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=13864, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=14251, PETRI_PLACES=212, PETRI_TRANSITIONS=1132} [2023-08-24 03:32:44,330 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 180 predicate places. [2023-08-24 03:32:44,330 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 1132 transitions, 14251 flow [2023-08-24 03:32:44,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:44,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:32:44,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:32:44,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 03:32:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 03:32:44,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:32:44,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:32:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash -404478174, now seen corresponding path program 6 times [2023-08-24 03:32:44,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:32:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110447370] [2023-08-24 03:32:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:32:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:32:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:32:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:32:45,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:32:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110447370] [2023-08-24 03:32:45,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110447370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:32:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126991838] [2023-08-24 03:32:45,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:32:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:32:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:32:45,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:32:45,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 03:32:45,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:32:45,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:32:45,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 03:32:45,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:32:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:32:45,589 INFO L351 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 18 treesize of output 20 [2023-08-24 03:32:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:32:45,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:32:45,680 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:32:45,680 INFO L351 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 45 treesize of output 37 [2023-08-24 03:32:45,684 INFO L351 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 24 treesize of output 18 [2023-08-24 03:32:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 03:32:45,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126991838] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 03:32:45,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 03:32:45,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 8] total 23 [2023-08-24 03:32:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772354864] [2023-08-24 03:32:45,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:32:45,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:32:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:32:45,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:32:45,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=480, Unknown=5, NotChecked=0, Total=552 [2023-08-24 03:32:45,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 407 [2023-08-24 03:32:45,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 1132 transitions, 14251 flow. Second operand has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:45,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:32:45,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 407 [2023-08-24 03:32:45,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:32:55,844 INFO L124 PetriNetUnfolderBase]: 28535/44357 cut-off events. [2023-08-24 03:32:55,844 INFO L125 PetriNetUnfolderBase]: For 765289/765319 co-relation queries the response was YES. [2023-08-24 03:32:56,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349809 conditions, 44357 events. 28535/44357 cut-off events. For 765289/765319 co-relation queries the response was YES. Maximal size of possible extension queue 2739. Compared 348397 event pairs, 5819 based on Foata normal form. 24/44067 useless extension candidates. Maximal degree in co-relation 349730. Up to 24942 conditions per place. [2023-08-24 03:32:56,474 INFO L140 encePairwiseOnDemand]: 399/407 looper letters, 748 selfloop transitions, 520 changer transitions 0/1270 dead transitions. [2023-08-24 03:32:56,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1270 transitions, 18451 flow [2023-08-24 03:32:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:32:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:32:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 950 transitions. [2023-08-24 03:32:56,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389025389025389 [2023-08-24 03:32:56,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 950 transitions. [2023-08-24 03:32:56,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 950 transitions. [2023-08-24 03:32:56,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:32:56,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 950 transitions. [2023-08-24 03:32:56,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:56,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:56,478 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:32:56,478 INFO L175 Difference]: Start difference. First operand has 212 places, 1132 transitions, 14251 flow. Second operand 6 states and 950 transitions. [2023-08-24 03:32:56,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1270 transitions, 18451 flow [2023-08-24 03:33:06,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1270 transitions, 18369 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 03:33:06,063 INFO L231 Difference]: Finished difference. Result has 218 places, 1152 transitions, 16622 flow [2023-08-24 03:33:06,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=14169, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16622, PETRI_PLACES=218, PETRI_TRANSITIONS=1152} [2023-08-24 03:33:06,064 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 186 predicate places. [2023-08-24 03:33:06,064 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 1152 transitions, 16622 flow [2023-08-24 03:33:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:06,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:06,064 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] [2023-08-24 03:33:06,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 03:33:06,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:06,265 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:33:06,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash 918210214, now seen corresponding path program 1 times [2023-08-24 03:33:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:06,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106353263] [2023-08-24 03:33:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:06,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:33:06,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106353263] [2023-08-24 03:33:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106353263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314149512] [2023-08-24 03:33:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:06,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:06,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:06,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:33:06,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 03:33:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:06,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:33:06,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:33:06,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:33:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314149512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:06,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 03:33:06,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145638930] [2023-08-24 03:33:06,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:06,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 03:33:06,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 03:33:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-24 03:33:06,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 407 [2023-08-24 03:33:06,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1152 transitions, 16622 flow. Second operand has 12 states, 12 states have (on average 153.16666666666666) internal successors, (1838), 12 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:06,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:06,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 407 [2023-08-24 03:33:06,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:21,182 INFO L124 PetriNetUnfolderBase]: 36926/58903 cut-off events. [2023-08-24 03:33:21,183 INFO L125 PetriNetUnfolderBase]: For 1250009/1250059 co-relation queries the response was YES. [2023-08-24 03:33:21,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485172 conditions, 58903 events. 36926/58903 cut-off events. For 1250009/1250059 co-relation queries the response was YES. Maximal size of possible extension queue 3677. Compared 502370 event pairs, 13343 based on Foata normal form. 2789/61162 useless extension candidates. Maximal degree in co-relation 485091. Up to 43549 conditions per place. [2023-08-24 03:33:22,130 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 1180 selfloop transitions, 15 changer transitions 681/1886 dead transitions. [2023-08-24 03:33:22,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 1886 transitions, 30245 flow [2023-08-24 03:33:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:33:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:33:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 956 transitions. [2023-08-24 03:33:22,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914823914823915 [2023-08-24 03:33:22,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 956 transitions. [2023-08-24 03:33:22,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 956 transitions. [2023-08-24 03:33:22,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:22,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 956 transitions. [2023-08-24 03:33:22,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:22,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:22,135 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:22,135 INFO L175 Difference]: Start difference. First operand has 218 places, 1152 transitions, 16622 flow. Second operand 6 states and 956 transitions. [2023-08-24 03:33:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 1886 transitions, 30245 flow [2023-08-24 03:33:40,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 1886 transitions, 30213 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 03:33:40,371 INFO L231 Difference]: Finished difference. Result has 224 places, 1152 transitions, 17131 flow [2023-08-24 03:33:40,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=16596, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=17131, PETRI_PLACES=224, PETRI_TRANSITIONS=1152} [2023-08-24 03:33:40,372 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 192 predicate places. [2023-08-24 03:33:40,372 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 1152 transitions, 17131 flow [2023-08-24 03:33:40,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.16666666666666) internal successors, (1838), 12 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:40,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:33:40,372 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:33:40,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 03:33:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:40,573 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:33:40,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:33:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 802904834, now seen corresponding path program 7 times [2023-08-24 03:33:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:33:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9165704] [2023-08-24 03:33:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:33:40,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:33:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:33:41,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:33:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9165704] [2023-08-24 03:33:41,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9165704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:33:41,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202227351] [2023-08-24 03:33:41,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:33:41,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:33:41,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:33:41,350 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:33:41,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 03:33:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:33:41,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 03:33:41,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:33:41,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:33:41,597 INFO L351 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 18 treesize of output 20 [2023-08-24 03:33:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 03:33:41,623 INFO L351 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 18 treesize of output 20 [2023-08-24 03:33:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:33:41,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:33:41,731 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_608 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_608) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 0))) is different from false [2023-08-24 03:33:41,774 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 03:33:41,774 INFO L351 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 167 treesize of output 151 [2023-08-24 03:33:41,778 INFO L351 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 64 treesize of output 58 [2023-08-24 03:33:41,780 INFO L351 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 58 treesize of output 46 [2023-08-24 03:33:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 03:33:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202227351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:33:41,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:33:41,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 24 [2023-08-24 03:33:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528772845] [2023-08-24 03:33:41,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:33:41,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:33:41,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:33:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:33:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=486, Unknown=3, NotChecked=44, Total=600 [2023-08-24 03:33:41,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 407 [2023-08-24 03:33:41,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 1152 transitions, 17131 flow. Second operand has 25 states, 25 states have (on average 125.36) internal successors, (3134), 25 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:33:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 407 [2023-08-24 03:33:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:33:54,339 INFO L124 PetriNetUnfolderBase]: 29540/46301 cut-off events. [2023-08-24 03:33:54,339 INFO L125 PetriNetUnfolderBase]: For 986796/986840 co-relation queries the response was YES. [2023-08-24 03:33:54,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390595 conditions, 46301 events. 29540/46301 cut-off events. For 986796/986840 co-relation queries the response was YES. Maximal size of possible extension queue 2726. Compared 367558 event pairs, 6252 based on Foata normal form. 112/46074 useless extension candidates. Maximal degree in co-relation 390510. Up to 23367 conditions per place. [2023-08-24 03:33:55,053 INFO L140 encePairwiseOnDemand]: 398/407 looper letters, 810 selfloop transitions, 531 changer transitions 14/1357 dead transitions. [2023-08-24 03:33:55,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1357 transitions, 22419 flow [2023-08-24 03:33:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 03:33:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 03:33:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2087 transitions. [2023-08-24 03:33:55,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.320485257985258 [2023-08-24 03:33:55,057 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2087 transitions. [2023-08-24 03:33:55,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2087 transitions. [2023-08-24 03:33:55,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:33:55,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2087 transitions. [2023-08-24 03:33:55,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 130.4375) internal successors, (2087), 16 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:55,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 407.0) internal successors, (6919), 17 states have internal predecessors, (6919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:55,062 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 407.0) internal successors, (6919), 17 states have internal predecessors, (6919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:33:55,062 INFO L175 Difference]: Start difference. First operand has 224 places, 1152 transitions, 17131 flow. Second operand 16 states and 2087 transitions. [2023-08-24 03:33:55,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1357 transitions, 22419 flow [2023-08-24 03:34:05,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1357 transitions, 21916 flow, removed 241 selfloop flow, removed 3 redundant places. [2023-08-24 03:34:05,988 INFO L231 Difference]: Finished difference. Result has 238 places, 1177 transitions, 18448 flow [2023-08-24 03:34:05,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=16604, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=18448, PETRI_PLACES=238, PETRI_TRANSITIONS=1177} [2023-08-24 03:34:05,989 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 206 predicate places. [2023-08-24 03:34:05,989 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 1177 transitions, 18448 flow [2023-08-24 03:34:05,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 125.36) internal successors, (3134), 25 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:05,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:05,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:05,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 03:34:06,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 03:34:06,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:34:06,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:06,195 INFO L85 PathProgramCache]: Analyzing trace with hash 986761347, now seen corresponding path program 2 times [2023-08-24 03:34:06,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:06,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597488580] [2023-08-24 03:34:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:06,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:34:06,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:06,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597488580] [2023-08-24 03:34:06,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597488580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:06,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849320822] [2023-08-24 03:34:06,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:34:06,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:06,377 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:34:06,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 03:34:06,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:34:06,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:34:06,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 03:34:06,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 03:34:06,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 03:34:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849320822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:34:06,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 03:34:06,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-08-24 03:34:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667059926] [2023-08-24 03:34:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:34:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:34:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:06,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:34:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-24 03:34:06,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 03:34:06,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 1177 transitions, 18448 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:06,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:06,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 03:34:06,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:34:18,869 INFO L124 PetriNetUnfolderBase]: 31255/48782 cut-off events. [2023-08-24 03:34:18,869 INFO L125 PetriNetUnfolderBase]: For 1086023/1086204 co-relation queries the response was YES. [2023-08-24 03:34:19,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425853 conditions, 48782 events. 31255/48782 cut-off events. For 1086023/1086204 co-relation queries the response was YES. Maximal size of possible extension queue 2907. Compared 389662 event pairs, 8008 based on Foata normal form. 324/48573 useless extension candidates. Maximal degree in co-relation 425767. Up to 41919 conditions per place. [2023-08-24 03:34:19,652 INFO L140 encePairwiseOnDemand]: 403/407 looper letters, 1173 selfloop transitions, 176 changer transitions 22/1381 dead transitions. [2023-08-24 03:34:19,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1381 transitions, 24510 flow [2023-08-24 03:34:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:34:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:34:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 760 transitions. [2023-08-24 03:34:19,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668304668304668 [2023-08-24 03:34:19,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 760 transitions. [2023-08-24 03:34:19,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 760 transitions. [2023-08-24 03:34:19,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:34:19,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 760 transitions. [2023-08-24 03:34:19,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:19,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:19,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:19,656 INFO L175 Difference]: Start difference. First operand has 238 places, 1177 transitions, 18448 flow. Second operand 4 states and 760 transitions. [2023-08-24 03:34:19,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1381 transitions, 24510 flow [2023-08-24 03:34:31,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1381 transitions, 23445 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-08-24 03:34:31,028 INFO L231 Difference]: Finished difference. Result has 227 places, 1237 transitions, 19074 flow [2023-08-24 03:34:31,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=17468, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=19074, PETRI_PLACES=227, PETRI_TRANSITIONS=1237} [2023-08-24 03:34:31,029 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 195 predicate places. [2023-08-24 03:34:31,029 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 1237 transitions, 19074 flow [2023-08-24 03:34:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:31,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:34:31,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:34:31,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 03:34:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 03:34:31,230 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:34:31,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:34:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1695577033, now seen corresponding path program 1 times [2023-08-24 03:34:31,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:34:31,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141038496] [2023-08-24 03:34:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:31,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:34:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:34:32,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:34:32,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141038496] [2023-08-24 03:34:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141038496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:34:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057405827] [2023-08-24 03:34:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:34:32,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:34:32,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:34:32,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:34:32,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 03:34:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:34:32,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 03:34:32,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:34:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:34:36,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:34:37,176 INFO L322 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2023-08-24 03:34:37,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2023-08-24 03:34:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 03:34:37,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057405827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:34:37,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:34:37,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 36 [2023-08-24 03:34:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280380290] [2023-08-24 03:34:37,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:34:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 03:34:37,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:34:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 03:34:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 03:34:37,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 407 [2023-08-24 03:34:37,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 1237 transitions, 19074 flow. Second operand has 37 states, 37 states have (on average 113.02702702702703) internal successors, (4182), 37 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:34:37,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:34:37,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 407 [2023-08-24 03:34:37,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:35:46,432 INFO L124 PetriNetUnfolderBase]: 115684/180371 cut-off events. [2023-08-24 03:35:46,433 INFO L125 PetriNetUnfolderBase]: For 4217657/4217657 co-relation queries the response was YES. [2023-08-24 03:35:49,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622909 conditions, 180371 events. 115684/180371 cut-off events. For 4217657/4217657 co-relation queries the response was YES. Maximal size of possible extension queue 9421. Compared 1651624 event pairs, 5496 based on Foata normal form. 5338/184110 useless extension candidates. Maximal degree in co-relation 1622830. Up to 77430 conditions per place. [2023-08-24 03:35:50,275 INFO L140 encePairwiseOnDemand]: 392/407 looper letters, 3439 selfloop transitions, 4248 changer transitions 32/7720 dead transitions. [2023-08-24 03:35:50,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 7720 transitions, 137109 flow [2023-08-24 03:35:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-24 03:35:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-24 03:35:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 8622 transitions. [2023-08-24 03:35:50,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29837007301796037 [2023-08-24 03:35:50,282 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 8622 transitions. [2023-08-24 03:35:50,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 8622 transitions. [2023-08-24 03:35:50,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:35:50,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 8622 transitions. [2023-08-24 03:35:50,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 121.43661971830986) internal successors, (8622), 71 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:50,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 407.0) internal successors, (29304), 72 states have internal predecessors, (29304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:50,306 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 407.0) internal successors, (29304), 72 states have internal predecessors, (29304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:35:50,307 INFO L175 Difference]: Start difference. First operand has 227 places, 1237 transitions, 19074 flow. Second operand 71 states and 8622 transitions. [2023-08-24 03:35:50,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 7720 transitions, 137109 flow [2023-08-24 03:39:16,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 7720 transitions, 136481 flow, removed 314 selfloop flow, removed 4 redundant places. [2023-08-24 03:39:16,420 INFO L231 Difference]: Finished difference. Result has 325 places, 5394 transitions, 106859 flow [2023-08-24 03:39:16,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=18994, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=558, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=106859, PETRI_PLACES=325, PETRI_TRANSITIONS=5394} [2023-08-24 03:39:16,421 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 293 predicate places. [2023-08-24 03:39:16,422 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 5394 transitions, 106859 flow [2023-08-24 03:39:16,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 113.02702702702703) internal successors, (4182), 37 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:39:16,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:39:16,422 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:39:16,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 03:39:16,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 03:39:16,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 03:39:16,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:39:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1441103147, now seen corresponding path program 2 times [2023-08-24 03:39:16,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:39:16,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621130034] [2023-08-24 03:39:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:39:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:39:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:39:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:39:16,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:39:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621130034] [2023-08-24 03:39:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621130034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:39:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259985217] [2023-08-24 03:39:16,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:39:16,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:39:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:39:16,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:39:16,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 03:39:17,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:39:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:39:17,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 03:39:17,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:39:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:39:17,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:39:17,491 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 03:39:17,491 INFO L351 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 24 treesize of output 11 [2023-08-24 03:39:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 03:39:17,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259985217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:39:17,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:39:17,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 22 [2023-08-24 03:39:17,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639463313] [2023-08-24 03:39:17,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:39:17,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:39:17,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:39:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:39:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2023-08-24 03:39:17,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 407 [2023-08-24 03:39:17,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 5394 transitions, 106859 flow. Second operand has 23 states, 23 states have (on average 133.04347826086956) internal successors, (3060), 23 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:39:17,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:39:17,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 407 [2023-08-24 03:39:17,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:42:27,530 INFO L124 PetriNetUnfolderBase]: 156671/244703 cut-off events. [2023-08-24 03:42:27,530 INFO L125 PetriNetUnfolderBase]: For 10611571/10611625 co-relation queries the response was YES. [2023-08-24 03:42:33,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679231 conditions, 244703 events. 156671/244703 cut-off events. For 10611571/10611625 co-relation queries the response was YES. Maximal size of possible extension queue 13891. Compared 2342551 event pairs, 9045 based on Foata normal form. 20495/263222 useless extension candidates. Maximal degree in co-relation 2679117. Up to 118529 conditions per place. [2023-08-24 03:42:34,818 INFO L140 encePairwiseOnDemand]: 398/407 looper letters, 6223 selfloop transitions, 1162 changer transitions 2855/10244 dead transitions. [2023-08-24 03:42:34,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 10244 transitions, 223745 flow [2023-08-24 03:42:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:42:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:42:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2795 transitions. [2023-08-24 03:42:34,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34336609336609336 [2023-08-24 03:42:34,821 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2795 transitions. [2023-08-24 03:42:34,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2795 transitions. [2023-08-24 03:42:34,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:42:34,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2795 transitions. [2023-08-24 03:42:34,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 139.75) internal successors, (2795), 20 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:42:34,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 407.0) internal successors, (8547), 21 states have internal predecessors, (8547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:42:34,828 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 407.0) internal successors, (8547), 21 states have internal predecessors, (8547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:42:34,828 INFO L175 Difference]: Start difference. First operand has 325 places, 5394 transitions, 106859 flow. Second operand 20 states and 2795 transitions. [2023-08-24 03:42:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 10244 transitions, 223745 flow Received shutdown request... [2023-08-24 03:45:06,108 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 03:45:06,149 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 03:45:07,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-24 03:45:07,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown