/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:23:56,878 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:23:56,943 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 15:23:56,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:23:56,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:23:56,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:23:56,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:23:56,975 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:23:56,975 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:23:56,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:23:56,978 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:23:56,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:23:56,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:23:56,979 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:23:56,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:23:56,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:23:56,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:23:56,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:23:56,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:23:56,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:23:56,980 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:23:56,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:23:56,981 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:23:56,981 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:23:56,981 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:23:56,981 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:23:56,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:23:56,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:23:56,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:23:56,982 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:23:56,983 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:23:56,983 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:23:56,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:23:56,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:23:56,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:23:56,983 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:23:57,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:23:57,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:23:57,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:23:57,221 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:23:57,221 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:23:57,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-24 15:23:58,174 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:23:58,345 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:23:58,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-24 15:23:58,352 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9b3f438/4bc107155a434e8da19c863f863305da/FLAGbb4753fbb [2023-08-24 15:23:58,370 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9b3f438/4bc107155a434e8da19c863f863305da [2023-08-24 15:23:58,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:23:58,375 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:23:58,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:23:58,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:23:58,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:23:58,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fdadf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58, skipping insertion in model container [2023-08-24 15:23:58,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,397 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:23:58,504 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-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-24 15:23:58,508 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:23:58,513 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:23:58,534 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-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-24 15:23:58,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:23:58,542 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:23:58,542 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:23:58,546 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:23:58,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58 WrapperNode [2023-08-24 15:23:58,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:23:58,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:23:58,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:23:58,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:23:58,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,557 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,572 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 198 [2023-08-24 15:23:58,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:23:58,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:23:58,573 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:23:58,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:23:58,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,579 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,596 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:23:58,596 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:23:58,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:23:58,597 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:23:58,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (1/1) ... [2023-08-24 15:23:58,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:23:58,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:23:58,619 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 15:23:58,628 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 15:23:58,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:23:58,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:23:58,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:23:58,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:23:58,645 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:23:58,645 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:23:58,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 15:23:58,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:23:58,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:23:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:23:58,647 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 15:23:58,721 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:23:58,722 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:23:58,920 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:23:59,021 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:23:59,022 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 15:23:59,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:23:59 BoogieIcfgContainer [2023-08-24 15:23:59,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:23:59,024 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:23:59,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:23:59,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:23:59,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:23:58" (1/3) ... [2023-08-24 15:23:59,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516fbf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:23:59, skipping insertion in model container [2023-08-24 15:23:59,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:23:58" (2/3) ... [2023-08-24 15:23:59,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516fbf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:23:59, skipping insertion in model container [2023-08-24 15:23:59,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:23:59" (3/3) ... [2023-08-24 15:23:59,028 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-08-24 15:23:59,038 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:23:59,039 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:23:59,039 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:23:59,083 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 15:23:59,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 148 transitions, 320 flow [2023-08-24 15:23:59,190 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-08-24 15:23:59,190 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:23:59,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 108. Up to 2 conditions per place. [2023-08-24 15:23:59,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 148 transitions, 320 flow [2023-08-24 15:23:59,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 135 transitions, 288 flow [2023-08-24 15:23:59,202 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:23:59,211 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 288 flow [2023-08-24 15:23:59,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 288 flow [2023-08-24 15:23:59,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2023-08-24 15:23:59,246 INFO L124 PetriNetUnfolderBase]: 12/135 cut-off events. [2023-08-24 15:23:59,246 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:23:59,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 12/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 108. Up to 2 conditions per place. [2023-08-24 15:23:59,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-24 15:24:03,252 INFO L134 LiptonReduction]: Checked pairs total: 1615 [2023-08-24 15:24:03,253 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-24 15:24:03,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:24:03,265 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;@313d4633, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:24:03,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 15:24:03,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:24:03,269 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-08-24 15:24:03,269 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 15:24:03,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:03,269 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] [2023-08-24 15:24:03,270 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 15:24:03,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash -908483189, now seen corresponding path program 1 times [2023-08-24 15:24:03,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:03,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305972558] [2023-08-24 15:24:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:03,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:03,655 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 15:24:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305972558] [2023-08-24 15:24:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305972558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:24:03,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:24:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 15:24:03,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423633469] [2023-08-24 15:24:03,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:03,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 15:24:03,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 15:24:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 15:24:03,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 277 [2023-08-24 15:24:03,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 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 15:24:03,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:03,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 277 [2023-08-24 15:24:03,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:03,792 INFO L124 PetriNetUnfolderBase]: 360/508 cut-off events. [2023-08-24 15:24:03,792 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-24 15:24:03,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1610 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-24 15:24:03,798 INFO L140 encePairwiseOnDemand]: 272/277 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-08-24 15:24:03,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-08-24 15:24:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 15:24:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 15:24:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-24 15:24:03,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042117930204573 [2023-08-24 15:24:03,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-24 15:24:03,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-24 15:24:03,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:03,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-24 15:24:03,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 15:24:03,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 15:24:03,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 15:24:03,826 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 419 transitions. [2023-08-24 15:24:03,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-08-24 15:24:03,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 15:24:03,830 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-08-24 15:24:03,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 15:24:03,835 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-24 15:24:03,835 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-08-24 15:24:03,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 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 15:24:03,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:03,836 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 15:24:03,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:24:03,836 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 15:24:03,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash 866298980, now seen corresponding path program 1 times [2023-08-24 15:24:03,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:03,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564878902] [2023-08-24 15:24:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:03,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:03,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564878902] [2023-08-24 15:24:03,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564878902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:24:03,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:24:03,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 15:24:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871458143] [2023-08-24 15:24:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:03,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:24:03,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:24:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:24:03,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 277 [2023-08-24 15:24:03,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 15:24:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:03,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 277 [2023-08-24 15:24:03,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:04,112 INFO L124 PetriNetUnfolderBase]: 615/925 cut-off events. [2023-08-24 15:24:04,112 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-24 15:24:04,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 925 events. 615/925 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3864 event pairs, 282 based on Foata normal form. 34/941 useless extension candidates. Maximal degree in co-relation 490. Up to 484 conditions per place. [2023-08-24 15:24:04,117 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 53 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-24 15:24:04,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-08-24 15:24:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:24:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:24:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-08-24 15:24:04,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4202166064981949 [2023-08-24 15:24:04,119 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-08-24 15:24:04,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-08-24 15:24:04,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:04,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-08-24 15:24:04,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 15:24:04,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:04,123 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:04,124 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 582 transitions. [2023-08-24 15:24:04,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-08-24 15:24:04,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 15:24:04,144 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 114 flow [2023-08-24 15:24:04,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-24 15:24:04,145 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-24 15:24:04,145 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 114 flow [2023-08-24 15:24:04,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 15:24:04,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:04,146 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 15:24:04,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 15:24:04,146 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 15:24:04,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash 36216018, now seen corresponding path program 1 times [2023-08-24 15:24:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:04,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027986568] [2023-08-24 15:24:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:04,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027986568] [2023-08-24 15:24:04,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027986568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:24:04,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:24:04,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 15:24:04,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073063494] [2023-08-24 15:24:04,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:04,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:24:04,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:24:04,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:24:04,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 277 [2023-08-24 15:24:04,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 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 15:24:04,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:04,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 277 [2023-08-24 15:24:04,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:04,362 INFO L124 PetriNetUnfolderBase]: 567/867 cut-off events. [2023-08-24 15:24:04,362 INFO L125 PetriNetUnfolderBase]: For 560/632 co-relation queries the response was YES. [2023-08-24 15:24:04,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 867 events. 567/867 cut-off events. For 560/632 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3443 event pairs, 328 based on Foata normal form. 106/969 useless extension candidates. Maximal degree in co-relation 1470. Up to 568 conditions per place. [2023-08-24 15:24:04,366 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 52 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-08-24 15:24:04,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 306 flow [2023-08-24 15:24:04,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:24:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:24:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 558 transitions. [2023-08-24 15:24:04,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028880866425993 [2023-08-24 15:24:04,368 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 558 transitions. [2023-08-24 15:24:04,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 558 transitions. [2023-08-24 15:24:04,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:04,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 558 transitions. [2023-08-24 15:24:04,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:24:04,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:04,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:04,371 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 114 flow. Second operand 5 states and 558 transitions. [2023-08-24 15:24:04,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 306 flow [2023-08-24 15:24:04,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 302 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 15:24:04,374 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 137 flow [2023-08-24 15:24:04,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-24 15:24:04,375 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-24 15:24:04,377 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 137 flow [2023-08-24 15:24:04,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 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 15:24:04,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:04,378 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 15:24:04,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 15:24:04,378 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 15:24:04,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2083216822, now seen corresponding path program 1 times [2023-08-24 15:24:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:04,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957439824] [2023-08-24 15:24:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:04,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957439824] [2023-08-24 15:24:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957439824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:24:04,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:24:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 15:24:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528788736] [2023-08-24 15:24:04,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:24:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:24:04,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 15:24:04,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 277 [2023-08-24 15:24:04,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 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 15:24:04,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:04,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 277 [2023-08-24 15:24:04,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:04,569 INFO L124 PetriNetUnfolderBase]: 419/637 cut-off events. [2023-08-24 15:24:04,569 INFO L125 PetriNetUnfolderBase]: For 721/793 co-relation queries the response was YES. [2023-08-24 15:24:04,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1860 conditions, 637 events. 419/637 cut-off events. For 721/793 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2465 event pairs, 223 based on Foata normal form. 86/711 useless extension candidates. Maximal degree in co-relation 1518. Up to 517 conditions per place. [2023-08-24 15:24:04,573 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 24 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-08-24 15:24:04,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 291 flow [2023-08-24 15:24:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:24:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:24:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 557 transitions. [2023-08-24 15:24:04,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40216606498194946 [2023-08-24 15:24:04,574 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 557 transitions. [2023-08-24 15:24:04,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 557 transitions. [2023-08-24 15:24:04,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:04,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 557 transitions. [2023-08-24 15:24:04,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 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 15:24:04,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:04,578 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:04,578 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 137 flow. Second operand 5 states and 557 transitions. [2023-08-24 15:24:04,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 291 flow [2023-08-24 15:24:04,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 15:24:04,580 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 110 flow [2023-08-24 15:24:04,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-08-24 15:24:04,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-08-24 15:24:04,581 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 110 flow [2023-08-24 15:24:04,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.8) internal successors, (529), 5 states have internal predecessors, (529), 0 states have call successors, (0), 0 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 15:24:04,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:04,581 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 15:24:04,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 15:24:04,581 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 15:24:04,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1743899046, now seen corresponding path program 1 times [2023-08-24 15:24:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:04,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736547216] [2023-08-24 15:24:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:04,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736547216] [2023-08-24 15:24:04,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736547216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632274718] [2023-08-24 15:24:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:04,662 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 15:24:04,665 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 15:24:04,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:04,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:24:04,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:04,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:04,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632274718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:04,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:04,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 15:24:04,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620960022] [2023-08-24 15:24:04,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:04,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 15:24:04,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:04,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 15:24:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-24 15:24:04,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:24:04,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 110 flow. Second operand has 13 states, 13 states have (on average 100.6923076923077) internal successors, (1309), 13 states have internal predecessors, (1309), 0 states have call successors, (0), 0 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 15:24:04,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:04,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:24:04,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:05,152 INFO L124 PetriNetUnfolderBase]: 544/799 cut-off events. [2023-08-24 15:24:05,153 INFO L125 PetriNetUnfolderBase]: For 802/802 co-relation queries the response was YES. [2023-08-24 15:24:05,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 799 events. 544/799 cut-off events. For 802/802 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3038 event pairs, 139 based on Foata normal form. 16/812 useless extension candidates. Maximal degree in co-relation 2433. Up to 408 conditions per place. [2023-08-24 15:24:05,156 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 57 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2023-08-24 15:24:05,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 396 flow [2023-08-24 15:24:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:24:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:24:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 843 transitions. [2023-08-24 15:24:05,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38041516245487367 [2023-08-24 15:24:05,159 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 843 transitions. [2023-08-24 15:24:05,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 843 transitions. [2023-08-24 15:24:05,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:05,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 843 transitions. [2023-08-24 15:24:05,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 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 15:24:05,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:05,163 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:05,163 INFO L175 Difference]: Start difference. First operand has 42 places, 28 transitions, 110 flow. Second operand 8 states and 843 transitions. [2023-08-24 15:24:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 396 flow [2023-08-24 15:24:05,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 334 flow, removed 29 selfloop flow, removed 8 redundant places. [2023-08-24 15:24:05,166 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 143 flow [2023-08-24 15:24:05,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=143, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-24 15:24:05,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-24 15:24:05,167 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 143 flow [2023-08-24 15:24:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.6923076923077) internal successors, (1309), 13 states have internal predecessors, (1309), 0 states have call successors, (0), 0 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 15:24:05,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:05,168 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 15:24:05,175 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 15:24:05,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:05,373 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 15:24:05,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -638105890, now seen corresponding path program 2 times [2023-08-24 15:24:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:05,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398786822] [2023-08-24 15:24:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:05,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:05,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398786822] [2023-08-24 15:24:05,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398786822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:05,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088892211] [2023-08-24 15:24:05,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:24:05,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:05,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:05,492 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 15:24:05,494 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 15:24:05,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:05,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:24:05,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:05,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:05,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088892211] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:05,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:24:05,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2023-08-24 15:24:05,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653716133] [2023-08-24 15:24:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:24:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:24:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:24:05,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:24:05,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 143 flow. Second operand has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:05,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:05,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:24:05,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:05,898 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2023-08-24 15:24:05,898 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2023-08-24 15:24:05,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4424 event pairs, 221 based on Foata normal form. 12/1093 useless extension candidates. Maximal degree in co-relation 3278. Up to 648 conditions per place. [2023-08-24 15:24:05,903 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-08-24 15:24:05,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2023-08-24 15:24:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 741 transitions. [2023-08-24 15:24:05,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38215575038679733 [2023-08-24 15:24:05,905 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 741 transitions. [2023-08-24 15:24:05,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 741 transitions. [2023-08-24 15:24:05,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:05,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 741 transitions. [2023-08-24 15:24:05,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.85714285714286) internal successors, (741), 7 states have internal predecessors, (741), 0 states have call successors, (0), 0 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 15:24:05,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:05,909 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:05,909 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 143 flow. Second operand 7 states and 741 transitions. [2023-08-24 15:24:05,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2023-08-24 15:24:05,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:05,912 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2023-08-24 15:24:05,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-24 15:24:05,914 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-24 15:24:05,914 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2023-08-24 15:24:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:05,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:05,916 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 15:24:05,922 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 15:24:06,122 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,SelfDestructingSolverStorable5 [2023-08-24 15:24:06,123 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 15:24:06,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1840456942, now seen corresponding path program 3 times [2023-08-24 15:24:06,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:06,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4723851] [2023-08-24 15:24:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:06,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:06,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:06,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4723851] [2023-08-24 15:24:06,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4723851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265282725] [2023-08-24 15:24:06,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:24:06,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:06,216 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 15:24:06,218 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 15:24:06,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:24:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:06,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:24:06,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:06,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265282725] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:06,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:24:06,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-24 15:24:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814288727] [2023-08-24 15:24:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:24:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:24:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:24:06,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:24:06,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:06,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:06,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:24:06,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:06,608 INFO L124 PetriNetUnfolderBase]: 840/1246 cut-off events. [2023-08-24 15:24:06,608 INFO L125 PetriNetUnfolderBase]: For 2270/2270 co-relation queries the response was YES. [2023-08-24 15:24:06,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4381 conditions, 1246 events. 840/1246 cut-off events. For 2270/2270 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5210 event pairs, 307 based on Foata normal form. 16/1260 useless extension candidates. Maximal degree in co-relation 4355. Up to 903 conditions per place. [2023-08-24 15:24:06,614 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 58 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2023-08-24 15:24:06,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 529 flow [2023-08-24 15:24:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 742 transitions. [2023-08-24 15:24:06,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38267148014440433 [2023-08-24 15:24:06,616 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 742 transitions. [2023-08-24 15:24:06,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 742 transitions. [2023-08-24 15:24:06,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:06,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 742 transitions. [2023-08-24 15:24:06,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 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 15:24:06,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:06,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:06,620 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 742 transitions. [2023-08-24 15:24:06,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 529 flow [2023-08-24 15:24:06,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 488 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:06,623 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 297 flow [2023-08-24 15:24:06,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-24 15:24:06,624 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-24 15:24:06,624 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 297 flow [2023-08-24 15:24:06,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:06,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:06,624 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 15:24:06,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 15:24:06,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:06,831 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 15:24:06,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1673064098, now seen corresponding path program 4 times [2023-08-24 15:24:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:06,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373967704] [2023-08-24 15:24:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:06,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373967704] [2023-08-24 15:24:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373967704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134853459] [2023-08-24 15:24:06,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:24:06,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:06,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:06,913 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 15:24:06,915 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 15:24:06,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:24:06,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:06,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:24:06,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:07,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134853459] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:24:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-08-24 15:24:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486784117] [2023-08-24 15:24:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:07,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:24:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:24:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:24:07,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:24:07,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:07,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:07,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:24:07,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:07,321 INFO L124 PetriNetUnfolderBase]: 824/1230 cut-off events. [2023-08-24 15:24:07,321 INFO L125 PetriNetUnfolderBase]: For 3214/3214 co-relation queries the response was YES. [2023-08-24 15:24:07,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4728 conditions, 1230 events. 824/1230 cut-off events. For 3214/3214 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5248 event pairs, 213 based on Foata normal form. 16/1244 useless extension candidates. Maximal degree in co-relation 4699. Up to 676 conditions per place. [2023-08-24 15:24:07,327 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 58 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2023-08-24 15:24:07,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 634 flow [2023-08-24 15:24:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 744 transitions. [2023-08-24 15:24:07,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3837029396596184 [2023-08-24 15:24:07,330 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 744 transitions. [2023-08-24 15:24:07,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 744 transitions. [2023-08-24 15:24:07,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:07,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 744 transitions. [2023-08-24 15:24:07,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:24:07,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:07,334 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:07,334 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 297 flow. Second operand 7 states and 744 transitions. [2023-08-24 15:24:07,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 634 flow [2023-08-24 15:24:07,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 589 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-24 15:24:07,340 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 417 flow [2023-08-24 15:24:07,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=417, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2023-08-24 15:24:07,342 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-24 15:24:07,342 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 417 flow [2023-08-24 15:24:07,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:07,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:07,343 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 15:24:07,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 15:24:07,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:07,547 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 15:24:07,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1079660084, now seen corresponding path program 5 times [2023-08-24 15:24:07,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:07,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528514308] [2023-08-24 15:24:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:07,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528514308] [2023-08-24 15:24:07,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528514308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:07,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423169097] [2023-08-24 15:24:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:24:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:07,623 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 15:24:07,625 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 15:24:07,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:07,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:07,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:24:07,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:07,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:07,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423169097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:07,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:07,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-24 15:24:07,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133560580] [2023-08-24 15:24:07,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:07,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:24:07,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:24:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:24:07,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 277 [2023-08-24 15:24:07,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 417 flow. Second operand has 14 states, 14 states have (on average 97.28571428571429) internal successors, (1362), 14 states have internal predecessors, (1362), 0 states have call successors, (0), 0 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 15:24:07,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:07,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 277 [2023-08-24 15:24:07,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:08,194 INFO L124 PetriNetUnfolderBase]: 850/1272 cut-off events. [2023-08-24 15:24:08,194 INFO L125 PetriNetUnfolderBase]: For 4255/4255 co-relation queries the response was YES. [2023-08-24 15:24:08,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5273 conditions, 1272 events. 850/1272 cut-off events. For 4255/4255 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5037 event pairs, 212 based on Foata normal form. 14/1286 useless extension candidates. Maximal degree in co-relation 5241. Up to 624 conditions per place. [2023-08-24 15:24:08,200 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 87 selfloop transitions, 56 changer transitions 0/143 dead transitions. [2023-08-24 15:24:08,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 143 transitions, 1253 flow [2023-08-24 15:24:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:24:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:24:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1316 transitions. [2023-08-24 15:24:08,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36545404054429326 [2023-08-24 15:24:08,203 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1316 transitions. [2023-08-24 15:24:08,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1316 transitions. [2023-08-24 15:24:08,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:08,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1316 transitions. [2023-08-24 15:24:08,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 101.23076923076923) internal successors, (1316), 13 states have internal predecessors, (1316), 0 states have call successors, (0), 0 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 15:24:08,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:24:08,209 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:24:08,209 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 417 flow. Second operand 13 states and 1316 transitions. [2023-08-24 15:24:08,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 143 transitions, 1253 flow [2023-08-24 15:24:08,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 143 transitions, 1175 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:08,219 INFO L231 Difference]: Finished difference. Result has 66 places, 87 transitions, 756 flow [2023-08-24 15:24:08,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=756, PETRI_PLACES=66, PETRI_TRANSITIONS=87} [2023-08-24 15:24:08,220 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-08-24 15:24:08,220 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 87 transitions, 756 flow [2023-08-24 15:24:08,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.28571428571429) internal successors, (1362), 14 states have internal predecessors, (1362), 0 states have call successors, (0), 0 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 15:24:08,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:08,221 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 15:24:08,230 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 15:24:08,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:08,426 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 15:24:08,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:08,426 INFO L85 PathProgramCache]: Analyzing trace with hash -761698272, now seen corresponding path program 6 times [2023-08-24 15:24:08,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:08,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684718642] [2023-08-24 15:24:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:08,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:08,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684718642] [2023-08-24 15:24:08,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684718642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:08,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919272962] [2023-08-24 15:24:08,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:24:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:08,517 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 15:24:08,517 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 15:24:08,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:24:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:08,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:24:08,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:08,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:24:08,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919272962] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:08,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:24:08,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-08-24 15:24:08,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288931513] [2023-08-24 15:24:08,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:08,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:24:08,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:24:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-24 15:24:08,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:24:08,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 87 transitions, 756 flow. Second operand has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:08,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:08,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:24:08,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:08,933 INFO L124 PetriNetUnfolderBase]: 788/1180 cut-off events. [2023-08-24 15:24:08,933 INFO L125 PetriNetUnfolderBase]: For 4428/4428 co-relation queries the response was YES. [2023-08-24 15:24:08,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5290 conditions, 1180 events. 788/1180 cut-off events. For 4428/4428 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4653 event pairs, 177 based on Foata normal form. 14/1192 useless extension candidates. Maximal degree in co-relation 5256. Up to 658 conditions per place. [2023-08-24 15:24:08,940 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 75 selfloop transitions, 39 changer transitions 0/119 dead transitions. [2023-08-24 15:24:08,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 119 transitions, 1140 flow [2023-08-24 15:24:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 742 transitions. [2023-08-24 15:24:08,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38267148014440433 [2023-08-24 15:24:08,942 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 742 transitions. [2023-08-24 15:24:08,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 742 transitions. [2023-08-24 15:24:08,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:08,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 742 transitions. [2023-08-24 15:24:08,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.0) internal successors, (742), 7 states have internal predecessors, (742), 0 states have call successors, (0), 0 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 15:24:08,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:08,946 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:08,946 INFO L175 Difference]: Start difference. First operand has 66 places, 87 transitions, 756 flow. Second operand 7 states and 742 transitions. [2023-08-24 15:24:08,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 119 transitions, 1140 flow [2023-08-24 15:24:08,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 119 transitions, 1059 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-24 15:24:08,957 INFO L231 Difference]: Finished difference. Result has 69 places, 92 transitions, 851 flow [2023-08-24 15:24:08,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=69, PETRI_TRANSITIONS=92} [2023-08-24 15:24:08,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2023-08-24 15:24:08,958 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 92 transitions, 851 flow [2023-08-24 15:24:08,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 15:24:08,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:08,958 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 15:24:08,965 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 15:24:09,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:09,165 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 15:24:09,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash 990769164, now seen corresponding path program 1 times [2023-08-24 15:24:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:09,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036561083] [2023-08-24 15:24:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:09,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036561083] [2023-08-24 15:24:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036561083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893770359] [2023-08-24 15:24:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:09,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:09,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:09,218 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 15:24:09,220 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 15:24:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:09,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 15:24:09,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:09,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:09,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893770359] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:09,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 15:24:09,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 15:24:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347995023] [2023-08-24 15:24:09,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:24:09,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 15:24:09,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:09,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 15:24:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 15:24:09,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 277 [2023-08-24 15:24:09,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 92 transitions, 851 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 15:24:09,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:09,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 277 [2023-08-24 15:24:09,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:09,467 INFO L124 PetriNetUnfolderBase]: 735/1071 cut-off events. [2023-08-24 15:24:09,467 INFO L125 PetriNetUnfolderBase]: For 6055/6291 co-relation queries the response was YES. [2023-08-24 15:24:09,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5107 conditions, 1071 events. 735/1071 cut-off events. For 6055/6291 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4376 event pairs, 191 based on Foata normal form. 186/1212 useless extension candidates. Maximal degree in co-relation 5070. Up to 828 conditions per place. [2023-08-24 15:24:09,473 INFO L140 encePairwiseOnDemand]: 272/277 looper letters, 95 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-08-24 15:24:09,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 1248 flow [2023-08-24 15:24:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 15:24:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 15:24:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 564 transitions. [2023-08-24 15:24:09,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072202166064982 [2023-08-24 15:24:09,475 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 564 transitions. [2023-08-24 15:24:09,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 564 transitions. [2023-08-24 15:24:09,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:09,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 564 transitions. [2023-08-24 15:24:09,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:24:09,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:09,478 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 277.0) internal successors, (1662), 6 states have internal predecessors, (1662), 0 states have call successors, (0), 0 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 15:24:09,478 INFO L175 Difference]: Start difference. First operand has 69 places, 92 transitions, 851 flow. Second operand 5 states and 564 transitions. [2023-08-24 15:24:09,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 1248 flow [2023-08-24 15:24:09,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 114 transitions, 1144 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-08-24 15:24:09,486 INFO L231 Difference]: Finished difference. Result has 70 places, 93 transitions, 810 flow [2023-08-24 15:24:09,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=810, PETRI_PLACES=70, PETRI_TRANSITIONS=93} [2023-08-24 15:24:09,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2023-08-24 15:24:09,487 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 93 transitions, 810 flow [2023-08-24 15:24:09,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 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 15:24:09,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:09,487 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 15:24:09,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 15:24:09,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:09,693 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 15:24:09,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:09,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1980019407, now seen corresponding path program 1 times [2023-08-24 15:24:09,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:09,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020778448] [2023-08-24 15:24:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:09,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:10,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020778448] [2023-08-24 15:24:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020778448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219731184] [2023-08-24 15:24:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:10,154 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 15:24:10,156 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 15:24:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:10,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-24 15:24:10,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:10,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:24:10,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:10,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:10,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:10,469 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 14 treesize of output 16 [2023-08-24 15:24:10,524 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:10,524 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 18 [2023-08-24 15:24:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:10,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:10,797 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~res2~0) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (<= c_~N~0 ~M~0) (<= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~res2~0)) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 15:24:11,641 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_436 (Array Int Int)) (v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (<= c_~N~0 ~M~0) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436))) (<= (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) (forall ((v_ArrVal_436 (Array Int Int)) (v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436))) (< (+ c_~res2~0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) (+ c_~res1~0 (select (select .cse1 c_~A~0.base) c_~A~0.offset) 1))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 15:24:11,746 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:11,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 48 [2023-08-24 15:24:11,760 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:11,760 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 6838 treesize of output 6334 [2023-08-24 15:24:11,779 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 188 treesize of output 164 [2023-08-24 15:24:11,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:11,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 76 [2023-08-24 15:24:11,800 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:11,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 75 [2023-08-24 15:24:11,926 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:11,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 47 [2023-08-24 15:24:11,929 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:24:11,938 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:11,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1654 treesize of output 1466 [2023-08-24 15:24:11,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:11,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-08-24 15:24:11,964 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:11,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2023-08-24 15:24:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:12,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219731184] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:12,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:12,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 24 [2023-08-24 15:24:12,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291007970] [2023-08-24 15:24:12,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 15:24:12,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 15:24:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=446, Unknown=11, NotChecked=90, Total=650 [2023-08-24 15:24:12,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 277 [2023-08-24 15:24:12,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 93 transitions, 810 flow. Second operand has 26 states, 26 states have (on average 78.88461538461539) internal successors, (2051), 26 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 15:24:12,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:12,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 277 [2023-08-24 15:24:12,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:12,677 INFO L124 PetriNetUnfolderBase]: 1169/1725 cut-off events. [2023-08-24 15:24:12,677 INFO L125 PetriNetUnfolderBase]: For 6690/6867 co-relation queries the response was YES. [2023-08-24 15:24:12,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8147 conditions, 1725 events. 1169/1725 cut-off events. For 6690/6867 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7444 event pairs, 156 based on Foata normal form. 134/1859 useless extension candidates. Maximal degree in co-relation 7313. Up to 1160 conditions per place. [2023-08-24 15:24:12,690 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 154 selfloop transitions, 85 changer transitions 3/248 dead transitions. [2023-08-24 15:24:12,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 248 transitions, 2557 flow [2023-08-24 15:24:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:24:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:24:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 788 transitions. [2023-08-24 15:24:12,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31608503810669875 [2023-08-24 15:24:12,693 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 788 transitions. [2023-08-24 15:24:12,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 788 transitions. [2023-08-24 15:24:12,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:12,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 788 transitions. [2023-08-24 15:24:12,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 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 15:24:12,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:24:12,697 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:24:12,697 INFO L175 Difference]: Start difference. First operand has 70 places, 93 transitions, 810 flow. Second operand 9 states and 788 transitions. [2023-08-24 15:24:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 248 transitions, 2557 flow [2023-08-24 15:24:12,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 248 transitions, 2532 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:12,712 INFO L231 Difference]: Finished difference. Result has 80 places, 155 transitions, 1665 flow [2023-08-24 15:24:12,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1665, PETRI_PLACES=80, PETRI_TRANSITIONS=155} [2023-08-24 15:24:12,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-08-24 15:24:12,713 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 155 transitions, 1665 flow [2023-08-24 15:24:12,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 78.88461538461539) internal successors, (2051), 26 states have internal predecessors, (2051), 0 states have call successors, (0), 0 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 15:24:12,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:12,713 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 15:24:12,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 15:24:12,919 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,SelfDestructingSolverStorable11 [2023-08-24 15:24:12,920 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 15:24:12,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 136047911, now seen corresponding path program 1 times [2023-08-24 15:24:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301044785] [2023-08-24 15:24:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:13,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:13,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301044785] [2023-08-24 15:24:13,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301044785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:13,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730036255] [2023-08-24 15:24:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:13,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:13,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:13,382 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 15:24:13,384 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 15:24:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:13,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:24:13,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:13,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:24:13,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:13,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:13,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:13,657 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 22 treesize of output 10 [2023-08-24 15:24:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:13,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:13,736 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 15:24:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730036255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:13,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 16 [2023-08-24 15:24:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208276536] [2023-08-24 15:24:13,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:13,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:24:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:24:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:24:13,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 277 [2023-08-24 15:24:13,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 155 transitions, 1665 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 15:24:13,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:13,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 277 [2023-08-24 15:24:13,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:14,244 INFO L124 PetriNetUnfolderBase]: 1767/2587 cut-off events. [2023-08-24 15:24:14,245 INFO L125 PetriNetUnfolderBase]: For 15060/15356 co-relation queries the response was YES. [2023-08-24 15:24:14,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14073 conditions, 2587 events. 1767/2587 cut-off events. For 15060/15356 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 11887 event pairs, 189 based on Foata normal form. 249/2789 useless extension candidates. Maximal degree in co-relation 12234. Up to 1668 conditions per place. [2023-08-24 15:24:14,261 INFO L140 encePairwiseOnDemand]: 266/277 looper letters, 164 selfloop transitions, 155 changer transitions 1/324 dead transitions. [2023-08-24 15:24:14,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 324 transitions, 4027 flow [2023-08-24 15:24:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:24:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:24:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2023-08-24 15:24:14,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34657039711191334 [2023-08-24 15:24:14,264 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2023-08-24 15:24:14,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2023-08-24 15:24:14,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:14,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2023-08-24 15:24:14,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 15:24:14,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:14,268 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:14,268 INFO L175 Difference]: Start difference. First operand has 80 places, 155 transitions, 1665 flow. Second operand 8 states and 768 transitions. [2023-08-24 15:24:14,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 324 transitions, 4027 flow [2023-08-24 15:24:14,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 324 transitions, 3889 flow, removed 68 selfloop flow, removed 1 redundant places. [2023-08-24 15:24:14,298 INFO L231 Difference]: Finished difference. Result has 90 places, 253 transitions, 3319 flow [2023-08-24 15:24:14,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=90, PETRI_TRANSITIONS=253} [2023-08-24 15:24:14,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-08-24 15:24:14,298 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 253 transitions, 3319 flow [2023-08-24 15:24:14,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 15:24:14,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:14,299 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 15:24:14,303 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 15:24:14,503 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,SelfDestructingSolverStorable12 [2023-08-24 15:24:14,503 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 15:24:14,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1369535091, now seen corresponding path program 2 times [2023-08-24 15:24:14,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:14,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383205270] [2023-08-24 15:24:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:15,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383205270] [2023-08-24 15:24:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383205270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:15,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061256730] [2023-08-24 15:24:15,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:24:15,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:15,010 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 15:24:15,014 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 15:24:15,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:15,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 15:24:15,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:15,221 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 14 treesize of output 16 [2023-08-24 15:24:15,243 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 15 treesize of output 7 [2023-08-24 15:24:15,250 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 15:24:15,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:15,310 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:15,310 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 46 treesize of output 34 [2023-08-24 15:24:15,313 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 13 treesize of output 11 [2023-08-24 15:24:15,374 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 15:24:15,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061256730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:15,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:15,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2023-08-24 15:24:15,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533570487] [2023-08-24 15:24:15,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:15,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:24:15,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:15,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:24:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=340, Unknown=3, NotChecked=0, Total=420 [2023-08-24 15:24:15,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 277 [2023-08-24 15:24:15,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 253 transitions, 3319 flow. Second operand has 21 states, 21 states have (on average 87.19047619047619) internal successors, (1831), 21 states have internal predecessors, (1831), 0 states have call successors, (0), 0 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 15:24:15,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:15,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 277 [2023-08-24 15:24:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:15,985 INFO L124 PetriNetUnfolderBase]: 2132/3113 cut-off events. [2023-08-24 15:24:15,985 INFO L125 PetriNetUnfolderBase]: For 23435/23817 co-relation queries the response was YES. [2023-08-24 15:24:15,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18935 conditions, 3113 events. 2132/3113 cut-off events. For 23435/23817 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14871 event pairs, 212 based on Foata normal form. 325/3400 useless extension candidates. Maximal degree in co-relation 16955. Up to 1658 conditions per place. [2023-08-24 15:24:16,003 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 145 selfloop transitions, 228 changer transitions 1/378 dead transitions. [2023-08-24 15:24:16,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 378 transitions, 5356 flow [2023-08-24 15:24:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:24:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:24:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2023-08-24 15:24:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34657039711191334 [2023-08-24 15:24:16,005 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2023-08-24 15:24:16,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2023-08-24 15:24:16,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:16,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2023-08-24 15:24:16,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 15:24:16,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:16,009 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:16,009 INFO L175 Difference]: Start difference. First operand has 90 places, 253 transitions, 3319 flow. Second operand 8 states and 768 transitions. [2023-08-24 15:24:16,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 378 transitions, 5356 flow [2023-08-24 15:24:16,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 378 transitions, 5213 flow, removed 45 selfloop flow, removed 2 redundant places. [2023-08-24 15:24:16,061 INFO L231 Difference]: Finished difference. Result has 98 places, 307 transitions, 4651 flow [2023-08-24 15:24:16,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4651, PETRI_PLACES=98, PETRI_TRANSITIONS=307} [2023-08-24 15:24:16,062 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2023-08-24 15:24:16,062 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 307 transitions, 4651 flow [2023-08-24 15:24:16,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 87.19047619047619) internal successors, (1831), 21 states have internal predecessors, (1831), 0 states have call successors, (0), 0 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 15:24:16,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:16,063 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 15:24:16,067 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 15:24:16,267 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,SelfDestructingSolverStorable13 [2023-08-24 15:24:16,267 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 15:24:16,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:16,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1155076253, now seen corresponding path program 3 times [2023-08-24 15:24:16,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:16,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335341852] [2023-08-24 15:24:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:16,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:16,494 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 15:24:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:16,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335341852] [2023-08-24 15:24:16,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335341852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:16,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307614959] [2023-08-24 15:24:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:24:16,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:16,496 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 15:24:16,497 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 15:24:16,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:24:16,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:16,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 15:24:16,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:16,644 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 15 treesize of output 7 [2023-08-24 15:24:16,653 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 15:24:16,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:16,675 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:16,676 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 23 treesize of output 16 [2023-08-24 15:24:16,702 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 15:24:16,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307614959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:16,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:16,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 15:24:16,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361753148] [2023-08-24 15:24:16,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:24:16,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:24:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:24:16,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 277 [2023-08-24 15:24:16,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 307 transitions, 4651 flow. Second operand has 11 states, 11 states have (on average 104.18181818181819) internal successors, (1146), 11 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 15:24:16,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:16,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 277 [2023-08-24 15:24:16,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:17,250 INFO L124 PetriNetUnfolderBase]: 2604/3741 cut-off events. [2023-08-24 15:24:17,250 INFO L125 PetriNetUnfolderBase]: For 38627/39123 co-relation queries the response was YES. [2023-08-24 15:24:17,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25768 conditions, 3741 events. 2604/3741 cut-off events. For 38627/39123 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18001 event pairs, 414 based on Foata normal form. 439/4123 useless extension candidates. Maximal degree in co-relation 23059. Up to 3122 conditions per place. [2023-08-24 15:24:17,274 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 292 selfloop transitions, 127 changer transitions 1/424 dead transitions. [2023-08-24 15:24:17,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 424 transitions, 6947 flow [2023-08-24 15:24:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 786 transitions. [2023-08-24 15:24:17,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40536358947911294 [2023-08-24 15:24:17,277 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 786 transitions. [2023-08-24 15:24:17,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 786 transitions. [2023-08-24 15:24:17,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:17,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 786 transitions. [2023-08-24 15:24:17,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.28571428571429) internal successors, (786), 7 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:24:17,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:17,280 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:17,280 INFO L175 Difference]: Start difference. First operand has 98 places, 307 transitions, 4651 flow. Second operand 7 states and 786 transitions. [2023-08-24 15:24:17,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 424 transitions, 6947 flow [2023-08-24 15:24:17,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 424 transitions, 6778 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:17,360 INFO L231 Difference]: Finished difference. Result has 105 places, 373 transitions, 6020 flow [2023-08-24 15:24:17,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6020, PETRI_PLACES=105, PETRI_TRANSITIONS=373} [2023-08-24 15:24:17,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2023-08-24 15:24:17,361 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 373 transitions, 6020 flow [2023-08-24 15:24:17,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.18181818181819) internal successors, (1146), 11 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 15:24:17,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:17,361 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 15:24:17,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 15:24:17,566 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 15:24:17,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1690910007, now seen corresponding path program 2 times [2023-08-24 15:24:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395065642] [2023-08-24 15:24:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:17,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:17,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395065642] [2023-08-24 15:24:17,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395065642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:17,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262854053] [2023-08-24 15:24:17,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:24:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:17,969 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:17,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 15:24:18,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:18,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:18,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 15:24:18,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:18,288 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:18,289 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 17 treesize of output 15 [2023-08-24 15:24:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:18,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:18,399 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:18,399 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 17 [2023-08-24 15:24:18,408 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:18,408 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 23 treesize of output 12 [2023-08-24 15:24:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:18,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262854053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:18,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:18,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2023-08-24 15:24:18,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711300821] [2023-08-24 15:24:18,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:18,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 15:24:18,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:18,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 15:24:18,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-08-24 15:24:18,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:24:18,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 373 transitions, 6020 flow. Second operand has 26 states, 26 states have (on average 81.11538461538461) internal successors, (2109), 26 states have internal predecessors, (2109), 0 states have call successors, (0), 0 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 15:24:18,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:18,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:24:18,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:20,379 INFO L124 PetriNetUnfolderBase]: 3007/4392 cut-off events. [2023-08-24 15:24:20,379 INFO L125 PetriNetUnfolderBase]: For 41829/41829 co-relation queries the response was YES. [2023-08-24 15:24:20,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30076 conditions, 4392 events. 3007/4392 cut-off events. For 41829/41829 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21062 event pairs, 611 based on Foata normal form. 2/4394 useless extension candidates. Maximal degree in co-relation 28157. Up to 3819 conditions per place. [2023-08-24 15:24:20,409 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 375 selfloop transitions, 189 changer transitions 10/574 dead transitions. [2023-08-24 15:24:20,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 574 transitions, 9313 flow [2023-08-24 15:24:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 15:24:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 15:24:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2482 transitions. [2023-08-24 15:24:20,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30897547616083654 [2023-08-24 15:24:20,414 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2482 transitions. [2023-08-24 15:24:20,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2482 transitions. [2023-08-24 15:24:20,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:20,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2482 transitions. [2023-08-24 15:24:20,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 85.58620689655173) internal successors, (2482), 29 states have internal predecessors, (2482), 0 states have call successors, (0), 0 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 15:24:20,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 277.0) internal successors, (8310), 30 states have internal predecessors, (8310), 0 states have call successors, (0), 0 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 15:24:20,425 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 277.0) internal successors, (8310), 30 states have internal predecessors, (8310), 0 states have call successors, (0), 0 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 15:24:20,425 INFO L175 Difference]: Start difference. First operand has 105 places, 373 transitions, 6020 flow. Second operand 29 states and 2482 transitions. [2023-08-24 15:24:20,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 574 transitions, 9313 flow [2023-08-24 15:24:20,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 574 transitions, 8985 flow, removed 40 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:20,535 INFO L231 Difference]: Finished difference. Result has 142 places, 486 transitions, 7942 flow [2023-08-24 15:24:20,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7942, PETRI_PLACES=142, PETRI_TRANSITIONS=486} [2023-08-24 15:24:20,536 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2023-08-24 15:24:20,536 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 486 transitions, 7942 flow [2023-08-24 15:24:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 81.11538461538461) internal successors, (2109), 26 states have internal predecessors, (2109), 0 states have call successors, (0), 0 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 15:24:20,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:20,537 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 15:24:20,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:20,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 15:24:20,741 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 15:24:20,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1666387623, now seen corresponding path program 4 times [2023-08-24 15:24:20,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:20,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234382311] [2023-08-24 15:24:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:20,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:20,946 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 15:24:20,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:20,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234382311] [2023-08-24 15:24:20,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234382311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:20,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167604574] [2023-08-24 15:24:20,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:24:20,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:20,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:20,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 15:24:21,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:24:21,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:21,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:24:21,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:21,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:24:21,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:21,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:21,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:21,186 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 15 treesize of output 7 [2023-08-24 15:24:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:21,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:21,249 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 15:24:21,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167604574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:21,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:21,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-08-24 15:24:21,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248205543] [2023-08-24 15:24:21,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:21,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:24:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:24:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:24:21,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 277 [2023-08-24 15:24:21,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 486 transitions, 7942 flow. Second operand has 15 states, 15 states have (on average 87.8) internal successors, (1317), 15 states have internal predecessors, (1317), 0 states have call successors, (0), 0 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 15:24:21,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:21,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 277 [2023-08-24 15:24:21,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:22,030 INFO L124 PetriNetUnfolderBase]: 3072/4450 cut-off events. [2023-08-24 15:24:22,031 INFO L125 PetriNetUnfolderBase]: For 54882/55367 co-relation queries the response was YES. [2023-08-24 15:24:22,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32601 conditions, 4450 events. 3072/4450 cut-off events. For 54882/55367 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22121 event pairs, 501 based on Foata normal form. 381/4736 useless extension candidates. Maximal degree in co-relation 32440. Up to 3926 conditions per place. [2023-08-24 15:24:22,061 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 380 selfloop transitions, 141 changer transitions 1/531 dead transitions. [2023-08-24 15:24:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 531 transitions, 9319 flow [2023-08-24 15:24:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:24:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:24:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 757 transitions. [2023-08-24 15:24:22,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416064981949459 [2023-08-24 15:24:22,063 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 757 transitions. [2023-08-24 15:24:22,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 757 transitions. [2023-08-24 15:24:22,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:22,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 757 transitions. [2023-08-24 15:24:22,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.625) internal successors, (757), 8 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 15:24:22,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:22,066 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:24:22,066 INFO L175 Difference]: Start difference. First operand has 142 places, 486 transitions, 7942 flow. Second operand 8 states and 757 transitions. [2023-08-24 15:24:22,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 531 transitions, 9319 flow [2023-08-24 15:24:22,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 531 transitions, 9053 flow, removed 129 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:22,267 INFO L231 Difference]: Finished difference. Result has 148 places, 493 transitions, 8082 flow [2023-08-24 15:24:22,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=7676, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8082, PETRI_PLACES=148, PETRI_TRANSITIONS=493} [2023-08-24 15:24:22,268 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2023-08-24 15:24:22,268 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 493 transitions, 8082 flow [2023-08-24 15:24:22,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.8) internal successors, (1317), 15 states have internal predecessors, (1317), 0 states have call successors, (0), 0 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 15:24:22,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:22,269 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 15:24:22,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:22,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 15:24:22,469 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 15:24:22,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1031074379, now seen corresponding path program 3 times [2023-08-24 15:24:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997911898] [2023-08-24 15:24:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:22,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:22,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997911898] [2023-08-24 15:24:22,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997911898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:22,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138100502] [2023-08-24 15:24:22,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:24:22,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:22,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:22,834 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:22,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 15:24:22,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:24:22,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:22,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 15:24:22,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:23,123 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:23,123 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 17 treesize of output 15 [2023-08-24 15:24:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:23,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:23,234 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:23,234 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 17 [2023-08-24 15:24:23,243 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:23,246 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 23 treesize of output 12 [2023-08-24 15:24:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:23,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138100502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:23,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-24 15:24:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375445256] [2023-08-24 15:24:23,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:24:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:23,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:24:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:24:23,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:24:23,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 493 transitions, 8082 flow. Second operand has 25 states, 25 states have (on average 80.96) internal successors, (2024), 25 states have internal predecessors, (2024), 0 states have call successors, (0), 0 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 15:24:23,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:23,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:24:23,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:24,837 INFO L124 PetriNetUnfolderBase]: 3369/4966 cut-off events. [2023-08-24 15:24:24,838 INFO L125 PetriNetUnfolderBase]: For 53998/53998 co-relation queries the response was YES. [2023-08-24 15:24:24,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35242 conditions, 4966 events. 3369/4966 cut-off events. For 53998/53998 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 24710 event pairs, 734 based on Foata normal form. 1/4961 useless extension candidates. Maximal degree in co-relation 35084. Up to 4355 conditions per place. [2023-08-24 15:24:24,871 INFO L140 encePairwiseOnDemand]: 262/277 looper letters, 419 selfloop transitions, 183 changer transitions 9/611 dead transitions. [2023-08-24 15:24:24,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 611 transitions, 10413 flow [2023-08-24 15:24:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 15:24:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 15:24:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1471 transitions. [2023-08-24 15:24:24,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31238054788702485 [2023-08-24 15:24:24,873 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1471 transitions. [2023-08-24 15:24:24,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1471 transitions. [2023-08-24 15:24:24,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:24,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1471 transitions. [2023-08-24 15:24:24,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 86.52941176470588) internal successors, (1471), 17 states have internal predecessors, (1471), 0 states have call successors, (0), 0 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 15:24:24,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 277.0) internal successors, (4986), 18 states have internal predecessors, (4986), 0 states have call successors, (0), 0 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 15:24:24,878 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 277.0) internal successors, (4986), 18 states have internal predecessors, (4986), 0 states have call successors, (0), 0 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 15:24:24,878 INFO L175 Difference]: Start difference. First operand has 148 places, 493 transitions, 8082 flow. Second operand 17 states and 1471 transitions. [2023-08-24 15:24:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 611 transitions, 10413 flow [2023-08-24 15:24:25,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 611 transitions, 10117 flow, removed 58 selfloop flow, removed 4 redundant places. [2023-08-24 15:24:25,063 INFO L231 Difference]: Finished difference. Result has 166 places, 539 transitions, 8952 flow [2023-08-24 15:24:25,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8952, PETRI_PLACES=166, PETRI_TRANSITIONS=539} [2023-08-24 15:24:25,064 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2023-08-24 15:24:25,064 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 539 transitions, 8952 flow [2023-08-24 15:24:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.96) internal successors, (2024), 25 states have internal predecessors, (2024), 0 states have call successors, (0), 0 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 15:24:25,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:25,065 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 15:24:25,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:25,266 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 15:24:25,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1098584103, now seen corresponding path program 4 times [2023-08-24 15:24:25,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559414941] [2023-08-24 15:24:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:25,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:25,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559414941] [2023-08-24 15:24:25,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559414941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:25,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76117333] [2023-08-24 15:24:25,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:24:25,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:25,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:25,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:25,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 15:24:25,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:24:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:25,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 15:24:25,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:25,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:24:25,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:25,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:25,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:26,079 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,079 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 17 treesize of output 15 [2023-08-24 15:24:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:26,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:26,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,768 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-08-24 15:24:26,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,785 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 1622 treesize of output 1534 [2023-08-24 15:24:26,798 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 88 [2023-08-24 15:24:26,807 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 150 [2023-08-24 15:24:26,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 71 [2023-08-24 15:24:26,933 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:26,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2023-08-24 15:24:26,941 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:26,942 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 414 treesize of output 394 [2023-08-24 15:24:26,954 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:26,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2023-08-24 15:24:26,964 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:26,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 137 [2023-08-24 15:24:26,977 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:26,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 62 [2023-08-24 15:24:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76117333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:27,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:27,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-08-24 15:24:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013944199] [2023-08-24 15:24:27,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:27,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 15:24:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:27,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 15:24:27,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=794, Unknown=14, NotChecked=0, Total=992 [2023-08-24 15:24:27,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 277 [2023-08-24 15:24:27,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 539 transitions, 8952 flow. Second operand has 32 states, 32 states have (on average 70.78125) internal successors, (2265), 32 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 15:24:27,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:27,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 277 [2023-08-24 15:24:27,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:29,793 INFO L124 PetriNetUnfolderBase]: 3736/5572 cut-off events. [2023-08-24 15:24:29,794 INFO L125 PetriNetUnfolderBase]: For 60469/60469 co-relation queries the response was YES. [2023-08-24 15:24:29,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39960 conditions, 5572 events. 3736/5572 cut-off events. For 60469/60469 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28777 event pairs, 768 based on Foata normal form. 1/5567 useless extension candidates. Maximal degree in co-relation 39688. Up to 4650 conditions per place. [2023-08-24 15:24:29,884 INFO L140 encePairwiseOnDemand]: 264/277 looper letters, 497 selfloop transitions, 271 changer transitions 10/778 dead transitions. [2023-08-24 15:24:29,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 778 transitions, 12995 flow [2023-08-24 15:24:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 15:24:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 15:24:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2576 transitions. [2023-08-24 15:24:29,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2735187937991081 [2023-08-24 15:24:29,888 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2576 transitions. [2023-08-24 15:24:29,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2576 transitions. [2023-08-24 15:24:29,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:29,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2576 transitions. [2023-08-24 15:24:29,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 75.76470588235294) internal successors, (2576), 34 states have internal predecessors, (2576), 0 states have call successors, (0), 0 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 15:24:29,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 277.0) internal successors, (9695), 35 states have internal predecessors, (9695), 0 states have call successors, (0), 0 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 15:24:29,897 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 277.0) internal successors, (9695), 35 states have internal predecessors, (9695), 0 states have call successors, (0), 0 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 15:24:29,897 INFO L175 Difference]: Start difference. First operand has 166 places, 539 transitions, 8952 flow. Second operand 34 states and 2576 transitions. [2023-08-24 15:24:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 778 transitions, 12995 flow [2023-08-24 15:24:30,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 778 transitions, 12616 flow, removed 95 selfloop flow, removed 5 redundant places. [2023-08-24 15:24:30,093 INFO L231 Difference]: Finished difference. Result has 208 places, 653 transitions, 10961 flow [2023-08-24 15:24:30,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=8669, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10961, PETRI_PLACES=208, PETRI_TRANSITIONS=653} [2023-08-24 15:24:30,093 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2023-08-24 15:24:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 653 transitions, 10961 flow [2023-08-24 15:24:30,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 70.78125) internal successors, (2265), 32 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 15:24:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:30,094 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 15:24:30,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:30,298 INFO L420 AbstractCegarLoop]: === Iteration 20 === 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 15:24:30,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash -253238455, now seen corresponding path program 5 times [2023-08-24 15:24:30,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:30,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846664700] [2023-08-24 15:24:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:30,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:30,580 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 15:24:30,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:30,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846664700] [2023-08-24 15:24:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846664700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:30,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642451559] [2023-08-24 15:24:30,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:24:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:30,585 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:30,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 15:24:30,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:30,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 15:24:30,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:30,822 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 14 treesize of output 16 [2023-08-24 15:24:30,848 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 15 treesize of output 7 [2023-08-24 15:24:30,858 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 15:24:30,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:30,906 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:30,907 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 54 treesize of output 38 [2023-08-24 15:24:30,909 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 17 treesize of output 11 [2023-08-24 15:24:30,968 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 15:24:30,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642451559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:30,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:30,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 15:24:30,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321015782] [2023-08-24 15:24:30,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:30,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:24:30,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:24:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=325, Unknown=5, NotChecked=0, Total=420 [2023-08-24 15:24:30,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 277 [2023-08-24 15:24:30,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 653 transitions, 10961 flow. Second operand has 21 states, 21 states have (on average 99.28571428571429) internal successors, (2085), 21 states have internal predecessors, (2085), 0 states have call successors, (0), 0 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 15:24:30,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:30,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 277 [2023-08-24 15:24:30,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:32,010 INFO L124 PetriNetUnfolderBase]: 3720/5528 cut-off events. [2023-08-24 15:24:32,010 INFO L125 PetriNetUnfolderBase]: For 72662/73202 co-relation queries the response was YES. [2023-08-24 15:24:32,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42282 conditions, 5528 events. 3720/5528 cut-off events. For 72662/73202 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29590 event pairs, 601 based on Foata normal form. 348/5753 useless extension candidates. Maximal degree in co-relation 42064. Up to 4702 conditions per place. [2023-08-24 15:24:32,050 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 501 selfloop transitions, 179 changer transitions 1/696 dead transitions. [2023-08-24 15:24:32,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 696 transitions, 12689 flow [2023-08-24 15:24:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:32,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 755 transitions. [2023-08-24 15:24:32,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893759669932955 [2023-08-24 15:24:32,051 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 755 transitions. [2023-08-24 15:24:32,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 755 transitions. [2023-08-24 15:24:32,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:32,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 755 transitions. [2023-08-24 15:24:32,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 15:24:32,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:32,054 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:32,054 INFO L175 Difference]: Start difference. First operand has 208 places, 653 transitions, 10961 flow. Second operand 7 states and 755 transitions. [2023-08-24 15:24:32,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 696 transitions, 12689 flow [2023-08-24 15:24:32,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 696 transitions, 12026 flow, removed 224 selfloop flow, removed 9 redundant places. [2023-08-24 15:24:32,301 INFO L231 Difference]: Finished difference. Result has 207 places, 659 transitions, 10817 flow [2023-08-24 15:24:32,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=10298, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10817, PETRI_PLACES=207, PETRI_TRANSITIONS=659} [2023-08-24 15:24:32,301 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-08-24 15:24:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 659 transitions, 10817 flow [2023-08-24 15:24:32,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.28571428571429) internal successors, (2085), 21 states have internal predecessors, (2085), 0 states have call successors, (0), 0 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 15:24:32,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:32,302 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 15:24:32,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:32,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:32,503 INFO L420 AbstractCegarLoop]: === Iteration 21 === 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 15:24:32,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:32,503 INFO L85 PathProgramCache]: Analyzing trace with hash -916719113, now seen corresponding path program 5 times [2023-08-24 15:24:32,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:32,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431271323] [2023-08-24 15:24:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:32,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:32,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:32,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431271323] [2023-08-24 15:24:32,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431271323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:32,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567220966] [2023-08-24 15:24:32,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:24:32,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:32,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:32,804 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:32,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 15:24:32,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:32,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:32,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 15:24:32,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:33,088 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 22 treesize of output 10 [2023-08-24 15:24:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:33,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:33,169 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:33,170 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 17 [2023-08-24 15:24:33,180 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:33,180 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 23 treesize of output 12 [2023-08-24 15:24:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:33,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567220966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:33,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:33,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 21 [2023-08-24 15:24:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980928850] [2023-08-24 15:24:33,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:33,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 15:24:33,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 15:24:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-08-24 15:24:33,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:24:33,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 659 transitions, 10817 flow. Second operand has 23 states, 23 states have (on average 81.30434782608695) internal successors, (1870), 23 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 15:24:33,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:33,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:24:33,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:34,845 INFO L124 PetriNetUnfolderBase]: 3871/5776 cut-off events. [2023-08-24 15:24:34,845 INFO L125 PetriNetUnfolderBase]: For 68095/68095 co-relation queries the response was YES. [2023-08-24 15:24:34,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43408 conditions, 5776 events. 3871/5776 cut-off events. For 68095/68095 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30123 event pairs, 847 based on Foata normal form. 4/5778 useless extension candidates. Maximal degree in co-relation 43185. Up to 4847 conditions per place. [2023-08-24 15:24:34,884 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 518 selfloop transitions, 220 changer transitions 3/741 dead transitions. [2023-08-24 15:24:34,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 741 transitions, 13057 flow [2023-08-24 15:24:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:24:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:24:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1734 transitions. [2023-08-24 15:24:34,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31299638989169676 [2023-08-24 15:24:34,886 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1734 transitions. [2023-08-24 15:24:34,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1734 transitions. [2023-08-24 15:24:34,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:34,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1734 transitions. [2023-08-24 15:24:34,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.7) internal successors, (1734), 20 states have internal predecessors, (1734), 0 states have call successors, (0), 0 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 15:24:34,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 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 15:24:34,891 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 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 15:24:34,891 INFO L175 Difference]: Start difference. First operand has 207 places, 659 transitions, 10817 flow. Second operand 20 states and 1734 transitions. [2023-08-24 15:24:34,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 741 transitions, 13057 flow [2023-08-24 15:24:35,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 741 transitions, 12821 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-08-24 15:24:35,154 INFO L231 Difference]: Finished difference. Result has 224 places, 658 transitions, 11086 flow [2023-08-24 15:24:35,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11086, PETRI_PLACES=224, PETRI_TRANSITIONS=658} [2023-08-24 15:24:35,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2023-08-24 15:24:35,155 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 658 transitions, 11086 flow [2023-08-24 15:24:35,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.30434782608695) internal successors, (1870), 23 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 15:24:35,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:35,155 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 15:24:35,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 15:24:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:35,356 INFO L420 AbstractCegarLoop]: === Iteration 22 === 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 15:24:35,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash -805327909, now seen corresponding path program 6 times [2023-08-24 15:24:35,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449779056] [2023-08-24 15:24:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:35,585 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 15:24:35,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449779056] [2023-08-24 15:24:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449779056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789208092] [2023-08-24 15:24:35,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:24:35,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:35,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:35,586 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:35,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 15:24:35,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:24:35,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:35,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 15:24:35,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:35,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:35,808 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 14 treesize of output 16 [2023-08-24 15:24:35,828 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 15 treesize of output 7 [2023-08-24 15:24:35,836 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 15:24:35,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:35,861 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_895 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_895) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) c_~res1~0)) is different from false [2023-08-24 15:24:35,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:35,867 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 54 treesize of output 38 [2023-08-24 15:24:35,869 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 17 treesize of output 11 [2023-08-24 15:24:35,933 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 15:24:35,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789208092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:35,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:35,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 15:24:35,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629415296] [2023-08-24 15:24:35,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:35,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:24:35,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:24:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=262, Unknown=1, NotChecked=34, Total=380 [2023-08-24 15:24:35,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 277 [2023-08-24 15:24:35,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 658 transitions, 11086 flow. Second operand has 20 states, 20 states have (on average 99.25) internal successors, (1985), 20 states have internal predecessors, (1985), 0 states have call successors, (0), 0 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 15:24:35,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:35,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 277 [2023-08-24 15:24:35,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:37,069 INFO L124 PetriNetUnfolderBase]: 3905/5793 cut-off events. [2023-08-24 15:24:37,069 INFO L125 PetriNetUnfolderBase]: For 77496/78100 co-relation queries the response was YES. [2023-08-24 15:24:37,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45151 conditions, 5793 events. 3905/5793 cut-off events. For 77496/78100 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 31299 event pairs, 713 based on Foata normal form. 404/6082 useless extension candidates. Maximal degree in co-relation 44913. Up to 4908 conditions per place. [2023-08-24 15:24:37,106 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 484 selfloop transitions, 226 changer transitions 1/726 dead transitions. [2023-08-24 15:24:37,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 726 transitions, 13196 flow [2023-08-24 15:24:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 758 transitions. [2023-08-24 15:24:37,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39092315626611657 [2023-08-24 15:24:37,114 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 758 transitions. [2023-08-24 15:24:37,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 758 transitions. [2023-08-24 15:24:37,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:37,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 758 transitions. [2023-08-24 15:24:37,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.28571428571429) internal successors, (758), 7 states have internal predecessors, (758), 0 states have call successors, (0), 0 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 15:24:37,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:37,117 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:37,117 INFO L175 Difference]: Start difference. First operand has 224 places, 658 transitions, 11086 flow. Second operand 7 states and 758 transitions. [2023-08-24 15:24:37,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 726 transitions, 13196 flow [2023-08-24 15:24:37,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 726 transitions, 12821 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-08-24 15:24:37,350 INFO L231 Difference]: Finished difference. Result has 219 places, 683 transitions, 11723 flow [2023-08-24 15:24:37,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=10711, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11723, PETRI_PLACES=219, PETRI_TRANSITIONS=683} [2023-08-24 15:24:37,351 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2023-08-24 15:24:37,351 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 683 transitions, 11723 flow [2023-08-24 15:24:37,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.25) internal successors, (1985), 20 states have internal predecessors, (1985), 0 states have call successors, (0), 0 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 15:24:37,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:37,351 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 15:24:37,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:37,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:37,552 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 15:24:37,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash -379283189, now seen corresponding path program 7 times [2023-08-24 15:24:37,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:37,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902554797] [2023-08-24 15:24:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:37,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:37,810 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 15:24:37,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:37,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902554797] [2023-08-24 15:24:37,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902554797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:37,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336881267] [2023-08-24 15:24:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:24:37,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:37,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:37,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 15:24:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:37,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:24:37,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:37,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:24:37,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:38,027 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 14 treesize of output 16 [2023-08-24 15:24:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:38,051 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 14 treesize of output 16 [2023-08-24 15:24:38,085 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 15 treesize of output 7 [2023-08-24 15:24:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:38,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:40,237 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_944 (Array Int Int)) (v_ArrVal_943 (Array Int Int))) (= (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_943) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_944) c_~A~0.base) c_~A~0.offset)) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-08-24 15:24:40,247 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_942 (Array Int Int)) (v_ArrVal_944 (Array Int Int)) (v_ArrVal_943 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_942))) (= (+ c_~res2~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_943) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_944) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0)))) is different from false [2023-08-24 15:24:40,254 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:40,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2023-08-24 15:24:40,258 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 2678 treesize of output 2422 [2023-08-24 15:24:40,263 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 136 treesize of output 130 [2023-08-24 15:24:40,267 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 59 treesize of output 55 [2023-08-24 15:24:40,271 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 70 treesize of output 62 [2023-08-24 15:24:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 15:24:40,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336881267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:40,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:40,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2023-08-24 15:24:40,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449994056] [2023-08-24 15:24:40,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:24:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:24:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=401, Unknown=16, NotChecked=86, Total=600 [2023-08-24 15:24:40,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 277 [2023-08-24 15:24:40,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 683 transitions, 11723 flow. Second operand has 25 states, 25 states have (on average 86.84) internal successors, (2171), 25 states have internal predecessors, (2171), 0 states have call successors, (0), 0 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 15:24:40,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:40,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 277 [2023-08-24 15:24:40,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:41,844 INFO L124 PetriNetUnfolderBase]: 4150/6171 cut-off events. [2023-08-24 15:24:41,845 INFO L125 PetriNetUnfolderBase]: For 90009/90754 co-relation queries the response was YES. [2023-08-24 15:24:41,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49300 conditions, 6171 events. 4150/6171 cut-off events. For 90009/90754 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33894 event pairs, 548 based on Foata normal form. 480/6556 useless extension candidates. Maximal degree in co-relation 49066. Up to 3901 conditions per place. [2023-08-24 15:24:41,894 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 349 selfloop transitions, 419 changer transitions 1/784 dead transitions. [2023-08-24 15:24:41,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 784 transitions, 14559 flow [2023-08-24 15:24:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:24:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:24:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 854 transitions. [2023-08-24 15:24:41,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3425591656638588 [2023-08-24 15:24:41,895 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 854 transitions. [2023-08-24 15:24:41,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 854 transitions. [2023-08-24 15:24:41,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:41,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 854 transitions. [2023-08-24 15:24:41,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.88888888888889) internal successors, (854), 9 states have internal predecessors, (854), 0 states have call successors, (0), 0 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 15:24:41,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:24:41,898 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:24:41,898 INFO L175 Difference]: Start difference. First operand has 219 places, 683 transitions, 11723 flow. Second operand 9 states and 854 transitions. [2023-08-24 15:24:41,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 784 transitions, 14559 flow [2023-08-24 15:24:42,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 784 transitions, 14146 flow, removed 40 selfloop flow, removed 4 redundant places. [2023-08-24 15:24:42,243 INFO L231 Difference]: Finished difference. Result has 227 places, 723 transitions, 13394 flow [2023-08-24 15:24:42,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=11326, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13394, PETRI_PLACES=227, PETRI_TRANSITIONS=723} [2023-08-24 15:24:42,244 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2023-08-24 15:24:42,244 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 723 transitions, 13394 flow [2023-08-24 15:24:42,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 86.84) internal successors, (2171), 25 states have internal predecessors, (2171), 0 states have call successors, (0), 0 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 15:24:42,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:42,244 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 15:24:42,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:42,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:42,444 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 15:24:42,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1666769571, now seen corresponding path program 6 times [2023-08-24 15:24:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211736854] [2023-08-24 15:24:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:42,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211736854] [2023-08-24 15:24:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211736854] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51470216] [2023-08-24 15:24:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:24:42,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:42,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:42,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 15:24:42,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:24:42,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:42,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-24 15:24:42,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:42,975 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 111 treesize of output 103 [2023-08-24 15:24:43,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 15:24:43,146 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 14 treesize of output 16 [2023-08-24 15:24:43,263 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:43,263 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 17 treesize of output 15 [2023-08-24 15:24:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:43,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:43,493 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_993 (Array Int Int))) (or (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_993) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~res2~0) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_993 (Array Int Int))) (or (<= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_993) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~res2~0)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 15:24:43,521 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_993 (Array Int Int)) (v_ArrVal_992 (Array Int Int))) (or (<= c_~res1~0 (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_992) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_993) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_993 (Array Int Int)) (v_ArrVal_992 (Array Int Int))) (or (<= c_~N~0 ~M~0) (< (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_992) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_993) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) (+ c_~res1~0 1)) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 15:24:43,533 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:43,533 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 120 treesize of output 88 [2023-08-24 15:24:43,536 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 80 treesize of output 68 [2023-08-24 15:24:43,556 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 36 treesize of output 30 [2023-08-24 15:24:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:24:43,595 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:24:43,600 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:43,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2023-08-24 15:24:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51470216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:43,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:43,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2023-08-24 15:24:43,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695390167] [2023-08-24 15:24:43,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:43,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 15:24:43,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 15:24:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=554, Unknown=2, NotChecked=98, Total=756 [2023-08-24 15:24:43,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 277 [2023-08-24 15:24:43,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 723 transitions, 13394 flow. Second operand has 28 states, 28 states have (on average 74.25) internal successors, (2079), 28 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 15:24:43,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:43,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 277 [2023-08-24 15:24:43,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:45,924 INFO L124 PetriNetUnfolderBase]: 5191/7772 cut-off events. [2023-08-24 15:24:45,924 INFO L125 PetriNetUnfolderBase]: For 109620/109620 co-relation queries the response was YES. [2023-08-24 15:24:45,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62565 conditions, 7772 events. 5191/7772 cut-off events. For 109620/109620 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 43317 event pairs, 823 based on Foata normal form. 1/7771 useless extension candidates. Maximal degree in co-relation 62327. Up to 4100 conditions per place. [2023-08-24 15:24:45,988 INFO L140 encePairwiseOnDemand]: 265/277 looper letters, 506 selfloop transitions, 537 changer transitions 3/1046 dead transitions. [2023-08-24 15:24:45,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1046 transitions, 19822 flow [2023-08-24 15:24:45,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:24:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:24:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1737 transitions. [2023-08-24 15:24:45,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2986075296544611 [2023-08-24 15:24:45,990 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1737 transitions. [2023-08-24 15:24:45,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1737 transitions. [2023-08-24 15:24:45,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:45,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1737 transitions. [2023-08-24 15:24:45,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.71428571428571) internal successors, (1737), 21 states have internal predecessors, (1737), 0 states have call successors, (0), 0 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 15:24:45,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 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 15:24:45,994 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 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 15:24:45,994 INFO L175 Difference]: Start difference. First operand has 227 places, 723 transitions, 13394 flow. Second operand 21 states and 1737 transitions. [2023-08-24 15:24:45,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1046 transitions, 19822 flow [2023-08-24 15:24:46,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 1046 transitions, 19384 flow, removed 163 selfloop flow, removed 2 redundant places. [2023-08-24 15:24:46,709 INFO L231 Difference]: Finished difference. Result has 248 places, 831 transitions, 16474 flow [2023-08-24 15:24:46,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=13132, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16474, PETRI_PLACES=248, PETRI_TRANSITIONS=831} [2023-08-24 15:24:46,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2023-08-24 15:24:46,709 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 831 transitions, 16474 flow [2023-08-24 15:24:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 74.25) internal successors, (2079), 28 states have internal predecessors, (2079), 0 states have call successors, (0), 0 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 15:24:46,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:46,710 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 15:24:46,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:46,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 15:24:46,910 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 15:24:46,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash 516768631, now seen corresponding path program 8 times [2023-08-24 15:24:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:46,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559995616] [2023-08-24 15:24:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:46,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:47,084 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 15:24:47,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:47,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559995616] [2023-08-24 15:24:47,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559995616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:47,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871535442] [2023-08-24 15:24:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:24:47,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:47,085 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:47,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 15:24:47,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:47,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 15:24:47,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:47,253 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 15 treesize of output 7 [2023-08-24 15:24:47,262 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 15:24:47,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:47,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:47,294 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 19 treesize of output 16 [2023-08-24 15:24:47,310 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 15:24:47,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871535442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:47,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:47,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 15:24:47,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340820663] [2023-08-24 15:24:47,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:47,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:24:47,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:47,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:24:47,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:24:47,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 277 [2023-08-24 15:24:47,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 831 transitions, 16474 flow. Second operand has 11 states, 11 states have (on average 104.18181818181819) internal successors, (1146), 11 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 15:24:47,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:47,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 277 [2023-08-24 15:24:47,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:48,900 INFO L124 PetriNetUnfolderBase]: 5162/7686 cut-off events. [2023-08-24 15:24:48,900 INFO L125 PetriNetUnfolderBase]: For 138395/138983 co-relation queries the response was YES. [2023-08-24 15:24:48,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65202 conditions, 7686 events. 5162/7686 cut-off events. For 138395/138983 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 43971 event pairs, 944 based on Foata normal form. 319/7803 useless extension candidates. Maximal degree in co-relation 64960. Up to 6933 conditions per place. [2023-08-24 15:24:48,964 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 673 selfloop transitions, 181 changer transitions 1/872 dead transitions. [2023-08-24 15:24:48,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 872 transitions, 18583 flow [2023-08-24 15:24:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 781 transitions. [2023-08-24 15:24:48,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027849406910779 [2023-08-24 15:24:48,965 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 781 transitions. [2023-08-24 15:24:48,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 781 transitions. [2023-08-24 15:24:48,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:48,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 781 transitions. [2023-08-24 15:24:48,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 15:24:48,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:48,968 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:48,968 INFO L175 Difference]: Start difference. First operand has 248 places, 831 transitions, 16474 flow. Second operand 7 states and 781 transitions. [2023-08-24 15:24:48,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 872 transitions, 18583 flow [2023-08-24 15:24:49,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 872 transitions, 17617 flow, removed 172 selfloop flow, removed 9 redundant places. [2023-08-24 15:24:49,501 INFO L231 Difference]: Finished difference. Result has 248 places, 843 transitions, 16144 flow [2023-08-24 15:24:49,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=15508, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16144, PETRI_PLACES=248, PETRI_TRANSITIONS=843} [2023-08-24 15:24:49,502 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2023-08-24 15:24:49,502 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 843 transitions, 16144 flow [2023-08-24 15:24:49,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.18181818181819) internal successors, (1146), 11 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 15:24:49,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:49,502 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 15:24:49,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:49,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 15:24:49,707 INFO L420 AbstractCegarLoop]: === Iteration 26 === 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 15:24:49,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:49,707 INFO L85 PathProgramCache]: Analyzing trace with hash -103130569, now seen corresponding path program 7 times [2023-08-24 15:24:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:49,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917649438] [2023-08-24 15:24:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917649438] [2023-08-24 15:24:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917649438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372765645] [2023-08-24 15:24:50,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:24:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:50,049 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:50,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 15:24:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:50,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 15:24:50,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:50,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:24:50,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:50,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:50,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:24:50,467 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:50,467 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 17 treesize of output 15 [2023-08-24 15:24:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:50,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:51,122 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:51,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-08-24 15:24:51,131 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:51,131 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 806 treesize of output 766 [2023-08-24 15:24:51,145 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:51,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 80 [2023-08-24 15:24:51,156 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:51,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 72 [2023-08-24 15:24:51,168 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:51,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 71 [2023-08-24 15:24:51,315 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:51,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2023-08-24 15:24:51,325 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:51,326 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 414 treesize of output 394 [2023-08-24 15:24:51,341 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:51,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 175 [2023-08-24 15:24:51,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:24:51,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 76 [2023-08-24 15:24:51,360 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:24:51,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 126 [2023-08-24 15:24:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:51,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372765645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:51,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:51,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2023-08-24 15:24:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586482200] [2023-08-24 15:24:51,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:24:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:24:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=752, Unknown=15, NotChecked=0, Total=930 [2023-08-24 15:24:51,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 277 [2023-08-24 15:24:51,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 843 transitions, 16144 flow. Second operand has 31 states, 31 states have (on average 70.74193548387096) internal successors, (2193), 31 states have internal predecessors, (2193), 0 states have call successors, (0), 0 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 15:24:51,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:51,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 277 [2023-08-24 15:24:51,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:54,536 INFO L124 PetriNetUnfolderBase]: 5656/8484 cut-off events. [2023-08-24 15:24:54,536 INFO L125 PetriNetUnfolderBase]: For 125821/125821 co-relation queries the response was YES. [2023-08-24 15:24:54,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69068 conditions, 8484 events. 5656/8484 cut-off events. For 125821/125821 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 47991 event pairs, 1299 based on Foata normal form. 1/8483 useless extension candidates. Maximal degree in co-relation 68822. Up to 7574 conditions per place. [2023-08-24 15:24:54,606 INFO L140 encePairwiseOnDemand]: 262/277 looper letters, 681 selfloop transitions, 263 changer transitions 9/953 dead transitions. [2023-08-24 15:24:54,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 953 transitions, 19116 flow [2023-08-24 15:24:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:24:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:24:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1599 transitions. [2023-08-24 15:24:54,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2748839608045384 [2023-08-24 15:24:54,608 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1599 transitions. [2023-08-24 15:24:54,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1599 transitions. [2023-08-24 15:24:54,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:54,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1599 transitions. [2023-08-24 15:24:54,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 76.14285714285714) internal successors, (1599), 21 states have internal predecessors, (1599), 0 states have call successors, (0), 0 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 15:24:54,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 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 15:24:54,612 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 277.0) internal successors, (6094), 22 states have internal predecessors, (6094), 0 states have call successors, (0), 0 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 15:24:54,612 INFO L175 Difference]: Start difference. First operand has 248 places, 843 transitions, 16144 flow. Second operand 21 states and 1599 transitions. [2023-08-24 15:24:54,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 953 transitions, 19116 flow [2023-08-24 15:24:55,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 953 transitions, 18682 flow, removed 119 selfloop flow, removed 2 redundant places. [2023-08-24 15:24:55,247 INFO L231 Difference]: Finished difference. Result has 271 places, 886 transitions, 17127 flow [2023-08-24 15:24:55,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=15838, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=17127, PETRI_PLACES=271, PETRI_TRANSITIONS=886} [2023-08-24 15:24:55,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2023-08-24 15:24:55,248 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 886 transitions, 17127 flow [2023-08-24 15:24:55,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.74193548387096) internal successors, (2193), 31 states have internal predecessors, (2193), 0 states have call successors, (0), 0 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 15:24:55,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:55,248 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 15:24:55,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 15:24:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 15:24:55,449 INFO L420 AbstractCegarLoop]: === Iteration 27 === 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 15:24:55,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2032097613, now seen corresponding path program 9 times [2023-08-24 15:24:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:55,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182964568] [2023-08-24 15:24:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:55,633 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 15:24:55,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:55,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182964568] [2023-08-24 15:24:55,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182964568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:55,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401101160] [2023-08-24 15:24:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:24:55,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:55,634 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:55,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 15:24:55,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:24:55,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:55,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 15:24:55,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:55,787 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 15 treesize of output 7 [2023-08-24 15:24:55,797 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 15:24:55,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:55,820 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:55,820 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 23 treesize of output 16 [2023-08-24 15:24:55,846 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 15:24:55,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401101160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:55,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:55,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 15:24:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827947676] [2023-08-24 15:24:55,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 15:24:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 15:24:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 15:24:55,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 277 [2023-08-24 15:24:55,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 886 transitions, 17127 flow. Second operand has 11 states, 11 states have (on average 104.0909090909091) internal successors, (1145), 11 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 15:24:55,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:55,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 277 [2023-08-24 15:24:55,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:24:57,735 INFO L124 PetriNetUnfolderBase]: 5550/8273 cut-off events. [2023-08-24 15:24:57,735 INFO L125 PetriNetUnfolderBase]: For 142297/142966 co-relation queries the response was YES. [2023-08-24 15:24:57,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70162 conditions, 8273 events. 5550/8273 cut-off events. For 142297/142966 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 48125 event pairs, 1161 based on Foata normal form. 321/8315 useless extension candidates. Maximal degree in co-relation 69910. Up to 7640 conditions per place. [2023-08-24 15:24:57,796 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 728 selfloop transitions, 174 changer transitions 1/924 dead transitions. [2023-08-24 15:24:57,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 924 transitions, 19308 flow [2023-08-24 15:24:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:24:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:24:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 780 transitions. [2023-08-24 15:24:57,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40226921093347084 [2023-08-24 15:24:57,797 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 780 transitions. [2023-08-24 15:24:57,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 780 transitions. [2023-08-24 15:24:57,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:24:57,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 780 transitions. [2023-08-24 15:24:57,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 111.42857142857143) internal successors, (780), 7 states have internal predecessors, (780), 0 states have call successors, (0), 0 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 15:24:57,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:57,799 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:24:57,799 INFO L175 Difference]: Start difference. First operand has 271 places, 886 transitions, 17127 flow. Second operand 7 states and 780 transitions. [2023-08-24 15:24:57,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 924 transitions, 19308 flow [2023-08-24 15:24:58,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 924 transitions, 18839 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-08-24 15:24:58,320 INFO L231 Difference]: Finished difference. Result has 272 places, 894 transitions, 17189 flow [2023-08-24 15:24:58,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=16660, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17189, PETRI_PLACES=272, PETRI_TRANSITIONS=894} [2023-08-24 15:24:58,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 242 predicate places. [2023-08-24 15:24:58,321 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 894 transitions, 17189 flow [2023-08-24 15:24:58,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.0909090909091) internal successors, (1145), 11 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 15:24:58,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:24:58,321 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 15:24:58,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-24 15:24:58,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:58,522 INFO L420 AbstractCegarLoop]: === Iteration 28 === 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 15:24:58,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:24:58,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1651734697, now seen corresponding path program 8 times [2023-08-24 15:24:58,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:24:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371542390] [2023-08-24 15:24:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:24:58,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:24:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:24:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:58,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:24:58,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371542390] [2023-08-24 15:24:58,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371542390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:24:58,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211496172] [2023-08-24 15:24:58,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:24:58,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:24:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:24:58,800 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:24:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 15:24:58,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:24:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:24:58,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 15:24:58,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:24:59,078 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 22 treesize of output 10 [2023-08-24 15:24:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:59,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:24:59,171 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:24:59,172 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 20 treesize of output 17 [2023-08-24 15:24:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:24:59,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211496172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:24:59,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:24:59,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-24 15:24:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476515493] [2023-08-24 15:24:59,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:24:59,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:24:59,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:24:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:24:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:24:59,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:24:59,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 894 transitions, 17189 flow. Second operand has 25 states, 25 states have (on average 80.92) internal successors, (2023), 25 states have internal predecessors, (2023), 0 states have call successors, (0), 0 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 15:24:59,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:24:59,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:24:59,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:01,637 INFO L124 PetriNetUnfolderBase]: 5765/8655 cut-off events. [2023-08-24 15:25:01,637 INFO L125 PetriNetUnfolderBase]: For 131838/131838 co-relation queries the response was YES. [2023-08-24 15:25:01,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71363 conditions, 8655 events. 5765/8655 cut-off events. For 131838/131838 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 49132 event pairs, 1391 based on Foata normal form. 1/8654 useless extension candidates. Maximal degree in co-relation 71108. Up to 7638 conditions per place. [2023-08-24 15:25:01,714 INFO L140 encePairwiseOnDemand]: 264/277 looper letters, 688 selfloop transitions, 248 changer transitions 1/937 dead transitions. [2023-08-24 15:25:01,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 937 transitions, 19424 flow [2023-08-24 15:25:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:25:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:25:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1132 transitions. [2023-08-24 15:25:01,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31435712302138297 [2023-08-24 15:25:01,716 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1132 transitions. [2023-08-24 15:25:01,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1132 transitions. [2023-08-24 15:25:01,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:01,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1132 transitions. [2023-08-24 15:25:01,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.07692307692308) internal successors, (1132), 13 states have internal predecessors, (1132), 0 states have call successors, (0), 0 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 15:25:01,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:25:01,719 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:25:01,719 INFO L175 Difference]: Start difference. First operand has 272 places, 894 transitions, 17189 flow. Second operand 13 states and 1132 transitions. [2023-08-24 15:25:01,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 937 transitions, 19424 flow [2023-08-24 15:25:02,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 937 transitions, 19126 flow, removed 48 selfloop flow, removed 3 redundant places. [2023-08-24 15:25:02,391 INFO L231 Difference]: Finished difference. Result has 282 places, 896 transitions, 17428 flow [2023-08-24 15:25:02,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=16891, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17428, PETRI_PLACES=282, PETRI_TRANSITIONS=896} [2023-08-24 15:25:02,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 252 predicate places. [2023-08-24 15:25:02,392 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 896 transitions, 17428 flow [2023-08-24 15:25:02,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.92) internal successors, (2023), 25 states have internal predecessors, (2023), 0 states have call successors, (0), 0 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 15:25:02,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:02,392 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 15:25:02,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:02,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 15:25:02,597 INFO L420 AbstractCegarLoop]: === Iteration 29 === 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 15:25:02,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1972087275, now seen corresponding path program 9 times [2023-08-24 15:25:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:02,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727460044] [2023-08-24 15:25:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:02,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:02,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727460044] [2023-08-24 15:25:02,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727460044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:02,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49242449] [2023-08-24 15:25:02,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:25:02,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:02,905 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:02,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 15:25:03,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:25:03,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:03,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 15:25:03,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:03,199 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 22 treesize of output 10 [2023-08-24 15:25:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:03,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:03,301 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:03,302 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 20 treesize of output 17 [2023-08-24 15:25:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:03,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49242449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:03,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:03,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-08-24 15:25:03,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099932829] [2023-08-24 15:25:03,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:03,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 15:25:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 15:25:03,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-08-24 15:25:03,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:25:03,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 896 transitions, 17428 flow. Second operand has 26 states, 26 states have (on average 80.8076923076923) internal successors, (2101), 26 states have internal predecessors, (2101), 0 states have call successors, (0), 0 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 15:25:03,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:03,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:25:03,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:06,033 INFO L124 PetriNetUnfolderBase]: 5787/8694 cut-off events. [2023-08-24 15:25:06,033 INFO L125 PetriNetUnfolderBase]: For 129929/129929 co-relation queries the response was YES. [2023-08-24 15:25:06,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71541 conditions, 8694 events. 5787/8694 cut-off events. For 129929/129929 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 49508 event pairs, 1366 based on Foata normal form. 2/8694 useless extension candidates. Maximal degree in co-relation 71286. Up to 7985 conditions per place. [2023-08-24 15:25:06,105 INFO L140 encePairwiseOnDemand]: 262/277 looper letters, 689 selfloop transitions, 246 changer transitions 3/938 dead transitions. [2023-08-24 15:25:06,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 938 transitions, 19598 flow [2023-08-24 15:25:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:25:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:25:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1375 transitions. [2023-08-24 15:25:06,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31024368231046934 [2023-08-24 15:25:06,108 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1375 transitions. [2023-08-24 15:25:06,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1375 transitions. [2023-08-24 15:25:06,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:06,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1375 transitions. [2023-08-24 15:25:06,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.9375) internal successors, (1375), 16 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:25:06,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 277.0) internal successors, (4709), 17 states have internal predecessors, (4709), 0 states have call successors, (0), 0 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 15:25:06,112 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 277.0) internal successors, (4709), 17 states have internal predecessors, (4709), 0 states have call successors, (0), 0 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 15:25:06,112 INFO L175 Difference]: Start difference. First operand has 282 places, 896 transitions, 17428 flow. Second operand 16 states and 1375 transitions. [2023-08-24 15:25:06,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 938 transitions, 19598 flow [2023-08-24 15:25:06,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 938 transitions, 19203 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-24 15:25:06,760 INFO L231 Difference]: Finished difference. Result has 288 places, 899 transitions, 17602 flow [2023-08-24 15:25:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=17013, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=17602, PETRI_PLACES=288, PETRI_TRANSITIONS=899} [2023-08-24 15:25:06,762 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2023-08-24 15:25:06,762 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 899 transitions, 17602 flow [2023-08-24 15:25:06,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 80.8076923076923) internal successors, (2101), 26 states have internal predecessors, (2101), 0 states have call successors, (0), 0 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 15:25:06,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:06,762 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 15:25:06,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:06,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 15:25:06,963 INFO L420 AbstractCegarLoop]: === Iteration 30 === 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 15:25:06,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2105475191, now seen corresponding path program 10 times [2023-08-24 15:25:06,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:06,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252461631] [2023-08-24 15:25:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:06,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:07,146 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 15:25:07,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252461631] [2023-08-24 15:25:07,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252461631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:07,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245465902] [2023-08-24 15:25:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:25:07,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:07,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:07,148 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:07,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 15:25:07,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:25:07,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:07,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:25:07,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:07,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:25:07,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:07,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:07,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:07,404 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 15 treesize of output 7 [2023-08-24 15:25:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:07,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:07,461 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 15:25:07,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245465902] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:07,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:07,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-08-24 15:25:07,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617934417] [2023-08-24 15:25:07,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:07,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:25:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:25:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:25:07,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 277 [2023-08-24 15:25:07,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 899 transitions, 17602 flow. Second operand has 15 states, 15 states have (on average 87.73333333333333) internal successors, (1316), 15 states have internal predecessors, (1316), 0 states have call successors, (0), 0 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 15:25:07,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:07,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 277 [2023-08-24 15:25:07,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:09,590 INFO L124 PetriNetUnfolderBase]: 5658/8454 cut-off events. [2023-08-24 15:25:09,590 INFO L125 PetriNetUnfolderBase]: For 151155/151823 co-relation queries the response was YES. [2023-08-24 15:25:09,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72110 conditions, 8454 events. 5658/8454 cut-off events. For 151155/151823 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 49626 event pairs, 1227 based on Foata normal form. 321/8497 useless extension candidates. Maximal degree in co-relation 71853. Up to 7689 conditions per place. [2023-08-24 15:25:09,672 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 718 selfloop transitions, 207 changer transitions 1/947 dead transitions. [2023-08-24 15:25:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 947 transitions, 20017 flow [2023-08-24 15:25:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:25:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:25:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 757 transitions. [2023-08-24 15:25:09,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416064981949459 [2023-08-24 15:25:09,673 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 757 transitions. [2023-08-24 15:25:09,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 757 transitions. [2023-08-24 15:25:09,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:09,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 757 transitions. [2023-08-24 15:25:09,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.625) internal successors, (757), 8 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 15:25:09,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:25:09,675 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:25:09,675 INFO L175 Difference]: Start difference. First operand has 288 places, 899 transitions, 17602 flow. Second operand 8 states and 757 transitions. [2023-08-24 15:25:09,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 947 transitions, 20017 flow [2023-08-24 15:25:10,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 947 transitions, 19497 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-08-24 15:25:10,382 INFO L231 Difference]: Finished difference. Result has 283 places, 911 transitions, 17876 flow [2023-08-24 15:25:10,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=17082, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17876, PETRI_PLACES=283, PETRI_TRANSITIONS=911} [2023-08-24 15:25:10,383 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2023-08-24 15:25:10,383 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 911 transitions, 17876 flow [2023-08-24 15:25:10,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.73333333333333) internal successors, (1316), 15 states have internal predecessors, (1316), 0 states have call successors, (0), 0 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 15:25:10,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:10,383 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 15:25:10,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:10,585 INFO L420 AbstractCegarLoop]: === Iteration 31 === 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 15:25:10,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 934926863, now seen corresponding path program 10 times [2023-08-24 15:25:10,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:10,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633241189] [2023-08-24 15:25:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633241189] [2023-08-24 15:25:10,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633241189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745625463] [2023-08-24 15:25:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:25:10,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:10,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:10,901 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:10,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 15:25:11,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:25:11,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:11,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 15:25:11,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:11,188 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:11,188 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 17 treesize of output 15 [2023-08-24 15:25:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:11,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:11,307 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:11,307 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 20 treesize of output 17 [2023-08-24 15:25:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:11,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745625463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:11,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:11,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-24 15:25:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87053163] [2023-08-24 15:25:11,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:11,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:25:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:25:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:25:11,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:25:11,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 911 transitions, 17876 flow. Second operand has 25 states, 25 states have (on average 80.92) internal successors, (2023), 25 states have internal predecessors, (2023), 0 states have call successors, (0), 0 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 15:25:11,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:11,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:25:11,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:14,208 INFO L124 PetriNetUnfolderBase]: 6009/9072 cut-off events. [2023-08-24 15:25:14,208 INFO L125 PetriNetUnfolderBase]: For 144802/144802 co-relation queries the response was YES. [2023-08-24 15:25:14,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75241 conditions, 9072 events. 6009/9072 cut-off events. For 144802/144802 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 52538 event pairs, 1413 based on Foata normal form. 1/9071 useless extension candidates. Maximal degree in co-relation 74982. Up to 8178 conditions per place. [2023-08-24 15:25:14,278 INFO L140 encePairwiseOnDemand]: 262/277 looper letters, 746 selfloop transitions, 277 changer transitions 9/1032 dead transitions. [2023-08-24 15:25:14,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1032 transitions, 21294 flow [2023-08-24 15:25:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 15:25:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 15:25:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1892 transitions. [2023-08-24 15:25:14,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3104693140794224 [2023-08-24 15:25:14,280 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1892 transitions. [2023-08-24 15:25:14,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1892 transitions. [2023-08-24 15:25:14,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:14,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1892 transitions. [2023-08-24 15:25:14,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 86.0) internal successors, (1892), 22 states have internal predecessors, (1892), 0 states have call successors, (0), 0 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 15:25:14,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 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 15:25:14,285 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 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 15:25:14,285 INFO L175 Difference]: Start difference. First operand has 283 places, 911 transitions, 17876 flow. Second operand 22 states and 1892 transitions. [2023-08-24 15:25:14,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1032 transitions, 21294 flow [2023-08-24 15:25:14,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 1032 transitions, 20729 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-08-24 15:25:14,964 INFO L231 Difference]: Finished difference. Result has 309 places, 971 transitions, 19288 flow [2023-08-24 15:25:14,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=17328, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=19288, PETRI_PLACES=309, PETRI_TRANSITIONS=971} [2023-08-24 15:25:14,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2023-08-24 15:25:14,965 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 971 transitions, 19288 flow [2023-08-24 15:25:14,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.92) internal successors, (2023), 25 states have internal predecessors, (2023), 0 states have call successors, (0), 0 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 15:25:14,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:14,965 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 15:25:14,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:15,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:15,166 INFO L420 AbstractCegarLoop]: === Iteration 32 === 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 15:25:15,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 784570873, now seen corresponding path program 11 times [2023-08-24 15:25:15,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:15,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770092737] [2023-08-24 15:25:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:15,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770092737] [2023-08-24 15:25:15,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770092737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795520131] [2023-08-24 15:25:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:25:15,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:15,434 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:15,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 15:25:15,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:25:15,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:15,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 15:25:15,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:15,687 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 22 treesize of output 10 [2023-08-24 15:25:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:15,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:15,783 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:15,783 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 20 treesize of output 17 [2023-08-24 15:25:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:15,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795520131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:15,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:15,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-08-24 15:25:15,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956610204] [2023-08-24 15:25:15,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:15,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:25:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:25:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:25:15,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 277 [2023-08-24 15:25:15,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 971 transitions, 19288 flow. Second operand has 19 states, 19 states have (on average 89.21052631578948) internal successors, (1695), 19 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 15:25:15,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:15,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 277 [2023-08-24 15:25:15,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:18,188 INFO L124 PetriNetUnfolderBase]: 6006/9097 cut-off events. [2023-08-24 15:25:18,188 INFO L125 PetriNetUnfolderBase]: For 151659/152145 co-relation queries the response was YES. [2023-08-24 15:25:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76623 conditions, 9097 events. 6006/9097 cut-off events. For 151659/152145 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 54291 event pairs, 1488 based on Foata normal form. 344/9366 useless extension candidates. Maximal degree in co-relation 76354. Up to 8406 conditions per place. [2023-08-24 15:25:18,274 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 774 selfloop transitions, 205 changer transitions 4/1041 dead transitions. [2023-08-24 15:25:18,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1041 transitions, 22294 flow [2023-08-24 15:25:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:25:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:25:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 857 transitions. [2023-08-24 15:25:18,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34376253509827515 [2023-08-24 15:25:18,275 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 857 transitions. [2023-08-24 15:25:18,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 857 transitions. [2023-08-24 15:25:18,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:18,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 857 transitions. [2023-08-24 15:25:18,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.22222222222223) internal successors, (857), 9 states have internal predecessors, (857), 0 states have call successors, (0), 0 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 15:25:18,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:25:18,278 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:25:18,278 INFO L175 Difference]: Start difference. First operand has 309 places, 971 transitions, 19288 flow. Second operand 9 states and 857 transitions. [2023-08-24 15:25:18,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1041 transitions, 22294 flow [2023-08-24 15:25:19,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1041 transitions, 21856 flow, removed 215 selfloop flow, removed 3 redundant places. [2023-08-24 15:25:19,049 INFO L231 Difference]: Finished difference. Result has 318 places, 1004 transitions, 20082 flow [2023-08-24 15:25:19,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=18950, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20082, PETRI_PLACES=318, PETRI_TRANSITIONS=1004} [2023-08-24 15:25:19,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2023-08-24 15:25:19,050 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1004 transitions, 20082 flow [2023-08-24 15:25:19,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 89.21052631578948) internal successors, (1695), 19 states have internal predecessors, (1695), 0 states have call successors, (0), 0 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 15:25:19,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:19,050 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 15:25:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:19,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:19,250 INFO L420 AbstractCegarLoop]: === Iteration 33 === 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 15:25:19,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:19,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1998323495, now seen corresponding path program 12 times [2023-08-24 15:25:19,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:19,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795803490] [2023-08-24 15:25:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:19,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:19,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795803490] [2023-08-24 15:25:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795803490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103655670] [2023-08-24 15:25:19,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:25:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:19,508 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:19,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 15:25:19,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:25:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:19,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 15:25:19,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:19,767 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 22 treesize of output 10 [2023-08-24 15:25:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:19,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:19,864 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:19,864 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 40 treesize of output 25 [2023-08-24 15:25:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103655670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:19,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:19,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-24 15:25:19,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707435403] [2023-08-24 15:25:19,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:19,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:25:19,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:25:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:25:19,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 277 [2023-08-24 15:25:19,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1004 transitions, 20082 flow. Second operand has 18 states, 18 states have (on average 89.22222222222223) internal successors, (1606), 18 states have internal predecessors, (1606), 0 states have call successors, (0), 0 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 15:25:19,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:19,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 277 [2023-08-24 15:25:19,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:22,228 INFO L124 PetriNetUnfolderBase]: 6028/9158 cut-off events. [2023-08-24 15:25:22,228 INFO L125 PetriNetUnfolderBase]: For 155960/156446 co-relation queries the response was YES. [2023-08-24 15:25:22,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77641 conditions, 9158 events. 6028/9158 cut-off events. For 155960/156446 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 55001 event pairs, 1502 based on Foata normal form. 344/9427 useless extension candidates. Maximal degree in co-relation 77367. Up to 8467 conditions per place. [2023-08-24 15:25:22,325 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 779 selfloop transitions, 211 changer transitions 4/1052 dead transitions. [2023-08-24 15:25:22,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1052 transitions, 22756 flow [2023-08-24 15:25:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:25:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:25:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1041 transitions. [2023-08-24 15:25:22,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416475221529373 [2023-08-24 15:25:22,326 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1041 transitions. [2023-08-24 15:25:22,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1041 transitions. [2023-08-24 15:25:22,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:22,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1041 transitions. [2023-08-24 15:25:22,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 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 15:25:22,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 277.0) internal successors, (3324), 12 states have internal predecessors, (3324), 0 states have call successors, (0), 0 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 15:25:22,329 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 277.0) internal successors, (3324), 12 states have internal predecessors, (3324), 0 states have call successors, (0), 0 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 15:25:22,329 INFO L175 Difference]: Start difference. First operand has 318 places, 1004 transitions, 20082 flow. Second operand 11 states and 1041 transitions. [2023-08-24 15:25:22,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1052 transitions, 22756 flow [2023-08-24 15:25:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1052 transitions, 22528 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-08-24 15:25:23,358 INFO L231 Difference]: Finished difference. Result has 327 places, 1015 transitions, 20631 flow [2023-08-24 15:25:23,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=19866, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20631, PETRI_PLACES=327, PETRI_TRANSITIONS=1015} [2023-08-24 15:25:23,359 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2023-08-24 15:25:23,359 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1015 transitions, 20631 flow [2023-08-24 15:25:23,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.22222222222223) internal successors, (1606), 18 states have internal predecessors, (1606), 0 states have call successors, (0), 0 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 15:25:23,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:23,359 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 15:25:23,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:23,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:23,560 INFO L420 AbstractCegarLoop]: === Iteration 34 === 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 15:25:23,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 351639707, now seen corresponding path program 13 times [2023-08-24 15:25:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:23,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302207280] [2023-08-24 15:25:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:23,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302207280] [2023-08-24 15:25:23,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302207280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:23,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662814747] [2023-08-24 15:25:23,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:25:23,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:23,867 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:23,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 15:25:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:23,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-24 15:25:23,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:24,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:25:24,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:24,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:24,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:24,241 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:24,241 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 17 treesize of output 15 [2023-08-24 15:25:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:24,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:25,938 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1448 (Array Int Int)) (v_ArrVal_1447 (Array Int Int)) (~M~0 Int)) (or (<= c_~N~0 ~M~0) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1447) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1448) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4))) 1))) (< (+ ~M~0 1) c_~N~0))) (forall ((v_ArrVal_1448 (Array Int Int)) (v_ArrVal_1447 (Array Int Int)) (~M~0 Int)) (or (<= c_~N~0 ~M~0) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1447) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1448) c_~A~0.base))) (<= (+ c_~res2~0 (select .cse1 (+ c_~A~0.offset (* ~M~0 4)))) (+ (select .cse1 c_~A~0.offset) c_~res1~0))) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 15:25:26,030 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:26,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2023-08-24 15:25:26,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:26,037 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 202 treesize of output 198 [2023-08-24 15:25:26,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:26,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 166 [2023-08-24 15:25:26,053 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:26,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 150 [2023-08-24 15:25:26,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:26,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 75 [2023-08-24 15:25:26,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:26,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-08-24 15:25:26,225 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:25:26,225 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 398 treesize of output 378 [2023-08-24 15:25:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:25:26,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2023-08-24 15:25:26,258 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:25:26,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 138 [2023-08-24 15:25:26,269 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:25:26,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 106 [2023-08-24 15:25:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:26,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662814747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:26,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2023-08-24 15:25:26,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626204976] [2023-08-24 15:25:26,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:26,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 15:25:26,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 15:25:26,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=575, Unknown=8, NotChecked=50, Total=756 [2023-08-24 15:25:26,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 277 [2023-08-24 15:25:26,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1015 transitions, 20631 flow. Second operand has 28 states, 28 states have (on average 70.96428571428571) internal successors, (1987), 28 states have internal predecessors, (1987), 0 states have call successors, (0), 0 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 15:25:26,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:26,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 277 [2023-08-24 15:25:26,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:35,115 INFO L124 PetriNetUnfolderBase]: 6743/10242 cut-off events. [2023-08-24 15:25:35,115 INFO L125 PetriNetUnfolderBase]: For 175325/175325 co-relation queries the response was YES. [2023-08-24 15:25:35,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87242 conditions, 10242 events. 6743/10242 cut-off events. For 175325/175325 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 61187 event pairs, 1408 based on Foata normal form. 2/10244 useless extension candidates. Maximal degree in co-relation 86965. Up to 8430 conditions per place. [2023-08-24 15:25:35,202 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 765 selfloop transitions, 482 changer transitions 9/1256 dead transitions. [2023-08-24 15:25:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1256 transitions, 26756 flow [2023-08-24 15:25:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 15:25:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 15:25:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2743 transitions. [2023-08-24 15:25:35,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27507019655034093 [2023-08-24 15:25:35,204 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2743 transitions. [2023-08-24 15:25:35,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2743 transitions. [2023-08-24 15:25:35,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:35,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2743 transitions. [2023-08-24 15:25:35,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 76.19444444444444) internal successors, (2743), 36 states have internal predecessors, (2743), 0 states have call successors, (0), 0 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 15:25:35,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 277.0) internal successors, (10249), 37 states have internal predecessors, (10249), 0 states have call successors, (0), 0 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 15:25:35,211 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 277.0) internal successors, (10249), 37 states have internal predecessors, (10249), 0 states have call successors, (0), 0 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 15:25:35,211 INFO L175 Difference]: Start difference. First operand has 327 places, 1015 transitions, 20631 flow. Second operand 36 states and 2743 transitions. [2023-08-24 15:25:35,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1256 transitions, 26756 flow [2023-08-24 15:25:36,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1256 transitions, 26292 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-08-24 15:25:36,097 INFO L231 Difference]: Finished difference. Result has 365 places, 1128 transitions, 23952 flow [2023-08-24 15:25:36,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=20186, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23952, PETRI_PLACES=365, PETRI_TRANSITIONS=1128} [2023-08-24 15:25:36,098 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 335 predicate places. [2023-08-24 15:25:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1128 transitions, 23952 flow [2023-08-24 15:25:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 70.96428571428571) internal successors, (1987), 28 states have internal predecessors, (1987), 0 states have call successors, (0), 0 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 15:25:36,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:36,098 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 15:25:36,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:36,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 15:25:36,299 INFO L420 AbstractCegarLoop]: === Iteration 35 === 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 15:25:36,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:36,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1827601575, now seen corresponding path program 11 times [2023-08-24 15:25:36,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:36,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536180123] [2023-08-24 15:25:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:36,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536180123] [2023-08-24 15:25:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536180123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786144623] [2023-08-24 15:25:36,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:25:36,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:36,757 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:36,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 15:25:36,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:25:36,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:36,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 15:25:36,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:25:37,027 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 14 treesize of output 16 [2023-08-24 15:25:37,064 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 15 treesize of output 7 [2023-08-24 15:25:37,072 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 15:25:37,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:37,104 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1493 (Array Int Int))) (= c_~res2~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1493) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-08-24 15:25:37,107 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1493 (Array Int Int))) (= (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1493) c_~A~0.base) c_~A~0.offset)) c_~res2~0)) is different from false [2023-08-24 15:25:37,115 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:37,116 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 46 treesize of output 34 [2023-08-24 15:25:37,118 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 13 treesize of output 11 [2023-08-24 15:25:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 15:25:37,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786144623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:37,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:37,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-24 15:25:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550616969] [2023-08-24 15:25:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:37,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 15:25:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 15:25:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=357, Unknown=2, NotChecked=78, Total=506 [2023-08-24 15:25:37,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 277 [2023-08-24 15:25:37,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1128 transitions, 23952 flow. Second operand has 23 states, 23 states have (on average 80.30434782608695) internal successors, (1847), 23 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 15:25:37,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:37,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 277 [2023-08-24 15:25:37,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:40,678 INFO L124 PetriNetUnfolderBase]: 6997/10601 cut-off events. [2023-08-24 15:25:40,679 INFO L125 PetriNetUnfolderBase]: For 208847/208847 co-relation queries the response was YES. [2023-08-24 15:25:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93568 conditions, 10601 events. 6997/10601 cut-off events. For 208847/208847 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 63433 event pairs, 1521 based on Foata normal form. 1/10602 useless extension candidates. Maximal degree in co-relation 93281. Up to 9364 conditions per place. [2023-08-24 15:25:40,905 INFO L140 encePairwiseOnDemand]: 262/277 looper letters, 945 selfloop transitions, 283 changer transitions 1/1229 dead transitions. [2023-08-24 15:25:40,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1229 transitions, 28008 flow [2023-08-24 15:25:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:25:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:25:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1040 transitions. [2023-08-24 15:25:40,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3128760529482551 [2023-08-24 15:25:40,906 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1040 transitions. [2023-08-24 15:25:40,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1040 transitions. [2023-08-24 15:25:40,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:40,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1040 transitions. [2023-08-24 15:25:40,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.66666666666667) internal successors, (1040), 12 states have internal predecessors, (1040), 0 states have call successors, (0), 0 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 15:25:40,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 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 15:25:40,909 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 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 15:25:40,909 INFO L175 Difference]: Start difference. First operand has 365 places, 1128 transitions, 23952 flow. Second operand 12 states and 1040 transitions. [2023-08-24 15:25:40,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1229 transitions, 28008 flow [2023-08-24 15:25:42,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1229 transitions, 27055 flow, removed 329 selfloop flow, removed 8 redundant places. [2023-08-24 15:25:42,051 INFO L231 Difference]: Finished difference. Result has 370 places, 1185 transitions, 24713 flow [2023-08-24 15:25:42,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=23009, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24713, PETRI_PLACES=370, PETRI_TRANSITIONS=1185} [2023-08-24 15:25:42,051 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2023-08-24 15:25:42,051 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1185 transitions, 24713 flow [2023-08-24 15:25:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 80.30434782608695) internal successors, (1847), 23 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 15:25:42,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:42,052 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 15:25:42,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:42,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:42,252 INFO L420 AbstractCegarLoop]: === Iteration 36 === 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 15:25:42,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1207432131, now seen corresponding path program 12 times [2023-08-24 15:25:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562871015] [2023-08-24 15:25:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:42,473 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 15:25:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562871015] [2023-08-24 15:25:42,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562871015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391218571] [2023-08-24 15:25:42,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:25:42,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:42,474 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:42,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 15:25:42,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:25:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:42,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 15:25:42,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:25:42,707 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 14 treesize of output 16 [2023-08-24 15:25:42,717 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 15 treesize of output 7 [2023-08-24 15:25:42,728 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 15:25:42,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:42,773 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:42,774 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 54 treesize of output 38 [2023-08-24 15:25:42,776 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 17 treesize of output 11 [2023-08-24 15:25:42,838 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 15:25:42,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391218571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:42,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:42,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 15:25:42,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277550417] [2023-08-24 15:25:42,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:42,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:25:42,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:25:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=294, Unknown=1, NotChecked=0, Total=380 [2023-08-24 15:25:42,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 277 [2023-08-24 15:25:42,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1185 transitions, 24713 flow. Second operand has 20 states, 20 states have (on average 99.2) internal successors, (1984), 20 states have internal predecessors, (1984), 0 states have call successors, (0), 0 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 15:25:42,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:42,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 277 [2023-08-24 15:25:42,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:46,172 INFO L124 PetriNetUnfolderBase]: 6801/10319 cut-off events. [2023-08-24 15:25:46,172 INFO L125 PetriNetUnfolderBase]: For 225155/225782 co-relation queries the response was YES. [2023-08-24 15:25:46,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94728 conditions, 10319 events. 6801/10319 cut-off events. For 225155/225782 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 63314 event pairs, 1358 based on Foata normal form. 236/10309 useless extension candidates. Maximal degree in co-relation 94436. Up to 9378 conditions per place. [2023-08-24 15:25:46,272 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 980 selfloop transitions, 214 changer transitions 1/1220 dead transitions. [2023-08-24 15:25:46,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1220 transitions, 27551 flow [2023-08-24 15:25:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:25:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:25:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 752 transitions. [2023-08-24 15:25:46,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38782877772047447 [2023-08-24 15:25:46,274 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 752 transitions. [2023-08-24 15:25:46,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 752 transitions. [2023-08-24 15:25:46,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:46,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 752 transitions. [2023-08-24 15:25:46,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 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 15:25:46,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:25:46,276 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:25:46,276 INFO L175 Difference]: Start difference. First operand has 370 places, 1185 transitions, 24713 flow. Second operand 7 states and 752 transitions. [2023-08-24 15:25:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1220 transitions, 27551 flow [2023-08-24 15:25:47,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1220 transitions, 26907 flow, removed 211 selfloop flow, removed 4 redundant places. [2023-08-24 15:25:47,437 INFO L231 Difference]: Finished difference. Result has 374 places, 1191 transitions, 24751 flow [2023-08-24 15:25:47,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=24121, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=971, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24751, PETRI_PLACES=374, PETRI_TRANSITIONS=1191} [2023-08-24 15:25:47,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2023-08-24 15:25:47,438 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1191 transitions, 24751 flow [2023-08-24 15:25:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.2) internal successors, (1984), 20 states have internal predecessors, (1984), 0 states have call successors, (0), 0 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 15:25:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:47,439 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 15:25:47,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:47,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:47,639 INFO L420 AbstractCegarLoop]: === Iteration 37 === 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 15:25:47,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1772972497, now seen corresponding path program 13 times [2023-08-24 15:25:47,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:47,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213761594] [2023-08-24 15:25:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:47,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:47,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213761594] [2023-08-24 15:25:47,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213761594] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:47,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023823632] [2023-08-24 15:25:47,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:25:47,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:47,976 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:47,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 15:25:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:48,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 15:25:48,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:48,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 15:25:48,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:48,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 15:25:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:25:48,275 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 14 treesize of output 16 [2023-08-24 15:25:48,291 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 15 treesize of output 7 [2023-08-24 15:25:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:48,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:48,326 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1587) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-08-24 15:25:48,330 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1587) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-08-24 15:25:48,334 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1587) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-08-24 15:25:48,337 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1587) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-08-24 15:25:48,342 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int)) (v_ArrVal_1586 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1586))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1587) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2023-08-24 15:25:48,352 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int)) (v_ArrVal_1586 (Array Int Int)) (v_ArrVal_1585 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1585) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1586))) (= (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1587) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-08-24 15:25:48,358 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:25:48,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-08-24 15:25:48,361 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 2566 treesize of output 2406 [2023-08-24 15:25:48,378 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 124 treesize of output 116 [2023-08-24 15:25:48,381 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 57 treesize of output 55 [2023-08-24 15:25:48,385 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 54 [2023-08-24 15:25:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 15:25:48,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023823632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:48,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:48,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 15:25:48,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257081637] [2023-08-24 15:25:48,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:48,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 15:25:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 15:25:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=305, Unknown=6, NotChecked=246, Total=650 [2023-08-24 15:25:48,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 277 [2023-08-24 15:25:48,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1191 transitions, 24751 flow. Second operand has 26 states, 26 states have (on average 86.73076923076923) internal successors, (2255), 26 states have internal predecessors, (2255), 0 states have call successors, (0), 0 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 15:25:48,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:48,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 277 [2023-08-24 15:25:48,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:51,868 INFO L124 PetriNetUnfolderBase]: 6903/10470 cut-off events. [2023-08-24 15:25:51,868 INFO L125 PetriNetUnfolderBase]: For 230208/231013 co-relation queries the response was YES. [2023-08-24 15:25:51,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96036 conditions, 10470 events. 6903/10470 cut-off events. For 230208/231013 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 64658 event pairs, 1421 based on Foata normal form. 292/10522 useless extension candidates. Maximal degree in co-relation 95741. Up to 9373 conditions per place. [2023-08-24 15:25:51,979 INFO L140 encePairwiseOnDemand]: 267/277 looper letters, 941 selfloop transitions, 273 changer transitions 1/1240 dead transitions. [2023-08-24 15:25:51,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1240 transitions, 27807 flow [2023-08-24 15:25:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:25:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:25:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2023-08-24 15:25:51,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397513036502206 [2023-08-24 15:25:51,980 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2023-08-24 15:25:51,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2023-08-24 15:25:51,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:51,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2023-08-24 15:25:51,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 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 15:25:51,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:25:51,982 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:25:51,982 INFO L175 Difference]: Start difference. First operand has 374 places, 1191 transitions, 24751 flow. Second operand 9 states and 847 transitions. [2023-08-24 15:25:51,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1240 transitions, 27807 flow [2023-08-24 15:25:53,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1240 transitions, 27349 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-08-24 15:25:53,155 INFO L231 Difference]: Finished difference. Result has 381 places, 1205 transitions, 25352 flow [2023-08-24 15:25:53,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=24297, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25352, PETRI_PLACES=381, PETRI_TRANSITIONS=1205} [2023-08-24 15:25:53,156 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 351 predicate places. [2023-08-24 15:25:53,156 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1205 transitions, 25352 flow [2023-08-24 15:25:53,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 86.73076923076923) internal successors, (2255), 26 states have internal predecessors, (2255), 0 states have call successors, (0), 0 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 15:25:53,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:53,156 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] [2023-08-24 15:25:53,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 15:25:53,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 15:25:53,357 INFO L420 AbstractCegarLoop]: === Iteration 38 === 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 15:25:53,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2132458400, now seen corresponding path program 14 times [2023-08-24 15:25:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190540375] [2023-08-24 15:25:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:53,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:25:53,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190540375] [2023-08-24 15:25:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190540375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161142109] [2023-08-24 15:25:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:25:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:53,413 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:53,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 15:25:53,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:25:53,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:53,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:25:53,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:25:53,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:25:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:25:53,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161142109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:25:53,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:25:53,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 15:25:53,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143305722] [2023-08-24 15:25:53,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:25:53,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:25:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:25:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:25:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:25:53,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 277 [2023-08-24 15:25:53,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1205 transitions, 25352 flow. Second operand has 14 states, 14 states have (on average 108.5) internal successors, (1519), 14 states have internal predecessors, (1519), 0 states have call successors, (0), 0 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 15:25:53,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:25:53,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 277 [2023-08-24 15:25:53,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:25:57,883 INFO L124 PetriNetUnfolderBase]: 8573/13156 cut-off events. [2023-08-24 15:25:57,884 INFO L125 PetriNetUnfolderBase]: For 330902/333182 co-relation queries the response was YES. [2023-08-24 15:25:57,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117549 conditions, 13156 events. 8573/13156 cut-off events. For 330902/333182 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 87678 event pairs, 2023 based on Foata normal form. 1374/14072 useless extension candidates. Maximal degree in co-relation 117161. Up to 6443 conditions per place. [2023-08-24 15:25:58,013 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 1233 selfloop transitions, 113 changer transitions 35/1466 dead transitions. [2023-08-24 15:25:58,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1466 transitions, 32257 flow [2023-08-24 15:25:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:25:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:25:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 805 transitions. [2023-08-24 15:25:58,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151624548736462 [2023-08-24 15:25:58,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 805 transitions. [2023-08-24 15:25:58,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 805 transitions. [2023-08-24 15:25:58,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:25:58,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 805 transitions. [2023-08-24 15:25:58,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.0) internal successors, (805), 7 states have internal predecessors, (805), 0 states have call successors, (0), 0 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 15:25:58,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:25:58,016 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:25:58,016 INFO L175 Difference]: Start difference. First operand has 381 places, 1205 transitions, 25352 flow. Second operand 7 states and 805 transitions. [2023-08-24 15:25:58,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1466 transitions, 32257 flow [2023-08-24 15:25:59,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1466 transitions, 31576 flow, removed 181 selfloop flow, removed 4 redundant places. [2023-08-24 15:25:59,415 INFO L231 Difference]: Finished difference. Result has 386 places, 1164 transitions, 24762 flow [2023-08-24 15:25:59,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=23813, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1032, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24762, PETRI_PLACES=386, PETRI_TRANSITIONS=1164} [2023-08-24 15:25:59,416 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2023-08-24 15:25:59,416 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1164 transitions, 24762 flow [2023-08-24 15:25:59,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 108.5) internal successors, (1519), 14 states have internal predecessors, (1519), 0 states have call successors, (0), 0 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 15:25:59,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:25:59,416 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] [2023-08-24 15:25:59,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-24 15:25:59,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 15:25:59,617 INFO L420 AbstractCegarLoop]: === Iteration 39 === 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 15:25:59,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:25:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 812247562, now seen corresponding path program 15 times [2023-08-24 15:25:59,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:25:59,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166773757] [2023-08-24 15:25:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:25:59,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:25:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:25:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:59,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:25:59,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166773757] [2023-08-24 15:25:59,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166773757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:25:59,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955601375] [2023-08-24 15:25:59,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:25:59,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:25:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:25:59,757 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:25:59,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 15:25:59,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:25:59,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:25:59,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 15:25:59,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:25:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:25:59,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:00,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955601375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:00,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:00,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 15:26:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010539528] [2023-08-24 15:26:00,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:00,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 15:26:00,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 15:26:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-08-24 15:26:00,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 277 [2023-08-24 15:26:00,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1164 transitions, 24762 flow. Second operand has 15 states, 15 states have (on average 103.66666666666667) internal successors, (1555), 15 states have internal predecessors, (1555), 0 states have call successors, (0), 0 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 15:26:00,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:00,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 277 [2023-08-24 15:26:00,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:03,949 INFO L124 PetriNetUnfolderBase]: 8091/12665 cut-off events. [2023-08-24 15:26:03,949 INFO L125 PetriNetUnfolderBase]: For 263814/263850 co-relation queries the response was YES. [2023-08-24 15:26:04,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111621 conditions, 12665 events. 8091/12665 cut-off events. For 263814/263850 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 83630 event pairs, 2450 based on Foata normal form. 494/13151 useless extension candidates. Maximal degree in co-relation 111251. Up to 6719 conditions per place. [2023-08-24 15:26:04,092 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 1049 selfloop transitions, 196 changer transitions 87/1379 dead transitions. [2023-08-24 15:26:04,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1379 transitions, 30800 flow [2023-08-24 15:26:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:26:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:26:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 775 transitions. [2023-08-24 15:26:04,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996905621454358 [2023-08-24 15:26:04,094 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 775 transitions. [2023-08-24 15:26:04,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 775 transitions. [2023-08-24 15:26:04,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:04,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 775 transitions. [2023-08-24 15:26:04,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.71428571428571) internal successors, (775), 7 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 15:26:04,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:26:04,096 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:26:04,096 INFO L175 Difference]: Start difference. First operand has 386 places, 1164 transitions, 24762 flow. Second operand 7 states and 775 transitions. [2023-08-24 15:26:04,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1379 transitions, 30800 flow [2023-08-24 15:26:05,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1379 transitions, 30465 flow, removed 78 selfloop flow, removed 9 redundant places. [2023-08-24 15:26:05,850 INFO L231 Difference]: Finished difference. Result has 386 places, 1127 transitions, 24033 flow [2023-08-24 15:26:05,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=24454, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24033, PETRI_PLACES=386, PETRI_TRANSITIONS=1127} [2023-08-24 15:26:05,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2023-08-24 15:26:05,851 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1127 transitions, 24033 flow [2023-08-24 15:26:05,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 103.66666666666667) internal successors, (1555), 15 states have internal predecessors, (1555), 0 states have call successors, (0), 0 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 15:26:05,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:05,852 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] [2023-08-24 15:26:05,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:06,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 15:26:06,053 INFO L420 AbstractCegarLoop]: === Iteration 40 === 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 15:26:06,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -431847975, now seen corresponding path program 14 times [2023-08-24 15:26:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:06,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094305738] [2023-08-24 15:26:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:06,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094305738] [2023-08-24 15:26:06,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094305738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:06,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014951061] [2023-08-24 15:26:06,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:26:06,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:06,113 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:06,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 15:26:06,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:26:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:06,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:26:06,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:06,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:06,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014951061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:06,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:06,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 15:26:06,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219008026] [2023-08-24 15:26:06,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:06,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:26:06,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:26:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:26:06,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 277 [2023-08-24 15:26:06,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1127 transitions, 24033 flow. Second operand has 14 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 15:26:06,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:06,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 277 [2023-08-24 15:26:06,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:09,127 INFO L124 PetriNetUnfolderBase]: 5804/9097 cut-off events. [2023-08-24 15:26:09,127 INFO L125 PetriNetUnfolderBase]: For 260336/261823 co-relation queries the response was YES. [2023-08-24 15:26:09,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88612 conditions, 9097 events. 5804/9097 cut-off events. For 260336/261823 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 60023 event pairs, 1637 based on Foata normal form. 1014/9797 useless extension candidates. Maximal degree in co-relation 88319. Up to 5099 conditions per place. [2023-08-24 15:26:09,224 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 908 selfloop transitions, 168 changer transitions 11/1156 dead transitions. [2023-08-24 15:26:09,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1156 transitions, 26086 flow [2023-08-24 15:26:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:26:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:26:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 913 transitions. [2023-08-24 15:26:09,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4120036101083033 [2023-08-24 15:26:09,225 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 913 transitions. [2023-08-24 15:26:09,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 913 transitions. [2023-08-24 15:26:09,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:09,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 913 transitions. [2023-08-24 15:26:09,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.125) internal successors, (913), 8 states have internal predecessors, (913), 0 states have call successors, (0), 0 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 15:26:09,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:26:09,227 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 277.0) internal successors, (2493), 9 states have internal predecessors, (2493), 0 states have call successors, (0), 0 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 15:26:09,227 INFO L175 Difference]: Start difference. First operand has 386 places, 1127 transitions, 24033 flow. Second operand 8 states and 913 transitions. [2023-08-24 15:26:09,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1156 transitions, 26086 flow [2023-08-24 15:26:10,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1156 transitions, 25727 flow, removed 160 selfloop flow, removed 7 redundant places. [2023-08-24 15:26:10,438 INFO L231 Difference]: Finished difference. Result has 380 places, 1028 transitions, 22057 flow [2023-08-24 15:26:10,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21499, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22057, PETRI_PLACES=380, PETRI_TRANSITIONS=1028} [2023-08-24 15:26:10,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 350 predicate places. [2023-08-24 15:26:10,439 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1028 transitions, 22057 flow [2023-08-24 15:26:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 15:26:10,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:10,440 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] [2023-08-24 15:26:10,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 15:26:10,648 INFO L420 AbstractCegarLoop]: === Iteration 41 === 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 15:26:10,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1101230226, now seen corresponding path program 15 times [2023-08-24 15:26:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:10,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677805405] [2023-08-24 15:26:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:10,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677805405] [2023-08-24 15:26:10,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677805405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:10,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165948999] [2023-08-24 15:26:10,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:26:10,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:10,736 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:10,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 15:26:10,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:26:10,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:10,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 15:26:10,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:10,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165948999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:11,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:11,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 15:26:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075467823] [2023-08-24 15:26:11,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:11,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 15:26:11,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:11,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 15:26:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-24 15:26:11,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 277 [2023-08-24 15:26:11,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1028 transitions, 22057 flow. Second operand has 14 states, 14 states have (on average 104.92857142857143) internal successors, (1469), 14 states have internal predecessors, (1469), 0 states have call successors, (0), 0 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 15:26:11,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:11,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 277 [2023-08-24 15:26:11,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:13,721 INFO L124 PetriNetUnfolderBase]: 5576/8901 cut-off events. [2023-08-24 15:26:13,722 INFO L125 PetriNetUnfolderBase]: For 221791/222103 co-relation queries the response was YES. [2023-08-24 15:26:13,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85332 conditions, 8901 events. 5576/8901 cut-off events. For 221791/222103 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 58867 event pairs, 1405 based on Foata normal form. 428/9252 useless extension candidates. Maximal degree in co-relation 85004. Up to 3691 conditions per place. [2023-08-24 15:26:13,806 INFO L140 encePairwiseOnDemand]: 271/277 looper letters, 791 selfloop transitions, 117 changer transitions 163/1155 dead transitions. [2023-08-24 15:26:13,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1155 transitions, 26477 flow [2023-08-24 15:26:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:26:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:26:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 778 transitions. [2023-08-24 15:26:13,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40123775141825685 [2023-08-24 15:26:13,807 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 778 transitions. [2023-08-24 15:26:13,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 778 transitions. [2023-08-24 15:26:13,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:13,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 778 transitions. [2023-08-24 15:26:13,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 111.14285714285714) internal successors, (778), 7 states have internal predecessors, (778), 0 states have call successors, (0), 0 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 15:26:13,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:26:13,809 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 277.0) internal successors, (2216), 8 states have internal predecessors, (2216), 0 states have call successors, (0), 0 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 15:26:13,809 INFO L175 Difference]: Start difference. First operand has 380 places, 1028 transitions, 22057 flow. Second operand 7 states and 778 transitions. [2023-08-24 15:26:13,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1155 transitions, 26477 flow [2023-08-24 15:26:14,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1155 transitions, 25849 flow, removed 119 selfloop flow, removed 7 redundant places. [2023-08-24 15:26:14,997 INFO L231 Difference]: Finished difference. Result has 382 places, 915 transitions, 19455 flow [2023-08-24 15:26:14,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21137, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=881, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19455, PETRI_PLACES=382, PETRI_TRANSITIONS=915} [2023-08-24 15:26:14,998 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2023-08-24 15:26:14,998 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 915 transitions, 19455 flow [2023-08-24 15:26:14,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 104.92857142857143) internal successors, (1469), 14 states have internal predecessors, (1469), 0 states have call successors, (0), 0 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 15:26:14,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:14,998 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 15:26:15,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:15,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:15,199 INFO L420 AbstractCegarLoop]: === Iteration 42 === 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 15:26:15,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash -148324864, now seen corresponding path program 1 times [2023-08-24 15:26:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727529049] [2023-08-24 15:26:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:15,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:15,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727529049] [2023-08-24 15:26:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727529049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877498608] [2023-08-24 15:26:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:15,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:15,261 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:15,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 15:26:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:15,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:26:15,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:15,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:15,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877498608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:15,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:15,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 15:26:15,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859690757] [2023-08-24 15:26:15,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:15,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 15:26:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:15,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 15:26:15,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-24 15:26:15,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:15,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 915 transitions, 19455 flow. Second operand has 16 states, 16 states have (on average 100.4375) internal successors, (1607), 16 states have internal predecessors, (1607), 0 states have call successors, (0), 0 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 15:26:15,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:15,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:15,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:17,789 INFO L124 PetriNetUnfolderBase]: 4962/7816 cut-off events. [2023-08-24 15:26:17,789 INFO L125 PetriNetUnfolderBase]: For 205778/205792 co-relation queries the response was YES. [2023-08-24 15:26:17,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76121 conditions, 7816 events. 4962/7816 cut-off events. For 205778/205792 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 48859 event pairs, 961 based on Foata normal form. 228/8041 useless extension candidates. Maximal degree in co-relation 75977. Up to 3791 conditions per place. [2023-08-24 15:26:17,990 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 757 selfloop transitions, 114 changer transitions 110/1017 dead transitions. [2023-08-24 15:26:17,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1017 transitions, 22654 flow [2023-08-24 15:26:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:26:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:26:17,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1073 transitions. [2023-08-24 15:26:17,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38736462093862817 [2023-08-24 15:26:17,992 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1073 transitions. [2023-08-24 15:26:17,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1073 transitions. [2023-08-24 15:26:17,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:17,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1073 transitions. [2023-08-24 15:26:17,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 107.3) internal successors, (1073), 10 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:26:17,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:17,994 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:17,994 INFO L175 Difference]: Start difference. First operand has 382 places, 915 transitions, 19455 flow. Second operand 10 states and 1073 transitions. [2023-08-24 15:26:17,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1017 transitions, 22654 flow [2023-08-24 15:26:19,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1017 transitions, 21735 flow, removed 333 selfloop flow, removed 18 redundant places. [2023-08-24 15:26:19,203 INFO L231 Difference]: Finished difference. Result has 361 places, 846 transitions, 17466 flow [2023-08-24 15:26:19,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=18220, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17466, PETRI_PLACES=361, PETRI_TRANSITIONS=846} [2023-08-24 15:26:19,204 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 331 predicate places. [2023-08-24 15:26:19,204 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 846 transitions, 17466 flow [2023-08-24 15:26:19,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.4375) internal successors, (1607), 16 states have internal predecessors, (1607), 0 states have call successors, (0), 0 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 15:26:19,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:19,204 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 15:26:19,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:19,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-24 15:26:19,409 INFO L420 AbstractCegarLoop]: === Iteration 43 === 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 15:26:19,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:19,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1321995254, now seen corresponding path program 2 times [2023-08-24 15:26:19,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:19,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061268158] [2023-08-24 15:26:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:19,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061268158] [2023-08-24 15:26:19,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061268158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192916113] [2023-08-24 15:26:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:26:19,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:19,522 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:19,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 15:26:19,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:26:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:19,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:26:19,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:19,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192916113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:19,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:19,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 15:26:19,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967377230] [2023-08-24 15:26:19,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:26:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:26:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:26:19,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:19,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 846 transitions, 17466 flow. Second operand has 18 states, 18 states have (on average 100.05555555555556) internal successors, (1801), 18 states have internal predecessors, (1801), 0 states have call successors, (0), 0 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 15:26:19,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:19,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:19,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:21,422 INFO L124 PetriNetUnfolderBase]: 3879/5970 cut-off events. [2023-08-24 15:26:21,422 INFO L125 PetriNetUnfolderBase]: For 153107/153115 co-relation queries the response was YES. [2023-08-24 15:26:21,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58753 conditions, 5970 events. 3879/5970 cut-off events. For 153107/153115 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34365 event pairs, 873 based on Foata normal form. 108/6073 useless extension candidates. Maximal degree in co-relation 58617. Up to 3791 conditions per place. [2023-08-24 15:26:21,575 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 736 selfloop transitions, 135 changer transitions 48/955 dead transitions. [2023-08-24 15:26:21,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 955 transitions, 20532 flow [2023-08-24 15:26:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:26:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:26:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1377 transitions. [2023-08-24 15:26:21,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38239377950569287 [2023-08-24 15:26:21,577 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1377 transitions. [2023-08-24 15:26:21,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1377 transitions. [2023-08-24 15:26:21,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:21,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1377 transitions. [2023-08-24 15:26:21,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.92307692307692) internal successors, (1377), 13 states have internal predecessors, (1377), 0 states have call successors, (0), 0 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 15:26:21,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:26:21,580 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:26:21,580 INFO L175 Difference]: Start difference. First operand has 361 places, 846 transitions, 17466 flow. Second operand 13 states and 1377 transitions. [2023-08-24 15:26:21,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 955 transitions, 20532 flow [2023-08-24 15:26:22,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 955 transitions, 19920 flow, removed 112 selfloop flow, removed 11 redundant places. [2023-08-24 15:26:22,336 INFO L231 Difference]: Finished difference. Result has 363 places, 832 transitions, 16748 flow [2023-08-24 15:26:22,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=16790, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16748, PETRI_PLACES=363, PETRI_TRANSITIONS=832} [2023-08-24 15:26:22,336 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 333 predicate places. [2023-08-24 15:26:22,336 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 832 transitions, 16748 flow [2023-08-24 15:26:22,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.05555555555556) internal successors, (1801), 18 states have internal predecessors, (1801), 0 states have call successors, (0), 0 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 15:26:22,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:22,337 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 15:26:22,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:22,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-24 15:26:22,542 INFO L420 AbstractCegarLoop]: === Iteration 44 === 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 15:26:22,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:22,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1908136272, now seen corresponding path program 3 times [2023-08-24 15:26:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:22,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049803680] [2023-08-24 15:26:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:22,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:22,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049803680] [2023-08-24 15:26:22,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049803680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317239158] [2023-08-24 15:26:22,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:26:22,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:22,616 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:22,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 15:26:22,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:26:22,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:22,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:26:22,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:22,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:22,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317239158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:22,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:22,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 15:26:22,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566007002] [2023-08-24 15:26:22,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:22,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:26:22,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:26:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:26:22,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:22,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 832 transitions, 16748 flow. Second operand has 17 states, 17 states have (on average 100.11764705882354) internal successors, (1702), 17 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 15:26:22,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:22,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:22,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:24,456 INFO L124 PetriNetUnfolderBase]: 3626/5663 cut-off events. [2023-08-24 15:26:24,456 INFO L125 PetriNetUnfolderBase]: For 138531/138539 co-relation queries the response was YES. [2023-08-24 15:26:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54377 conditions, 5663 events. 3626/5663 cut-off events. For 138531/138539 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 33122 event pairs, 871 based on Foata normal form. 187/5845 useless extension candidates. Maximal degree in co-relation 54243. Up to 3791 conditions per place. [2023-08-24 15:26:24,507 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 691 selfloop transitions, 71 changer transitions 83/879 dead transitions. [2023-08-24 15:26:24,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 879 transitions, 18618 flow [2023-08-24 15:26:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:26:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:26:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1064 transitions. [2023-08-24 15:26:24,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384115523465704 [2023-08-24 15:26:24,508 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1064 transitions. [2023-08-24 15:26:24,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1064 transitions. [2023-08-24 15:26:24,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:24,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1064 transitions. [2023-08-24 15:26:24,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 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 15:26:24,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:24,511 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:24,511 INFO L175 Difference]: Start difference. First operand has 363 places, 832 transitions, 16748 flow. Second operand 10 states and 1064 transitions. [2023-08-24 15:26:24,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 879 transitions, 18618 flow [2023-08-24 15:26:25,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 879 transitions, 18211 flow, removed 56 selfloop flow, removed 11 redundant places. [2023-08-24 15:26:25,192 INFO L231 Difference]: Finished difference. Result has 357 places, 747 transitions, 14458 flow [2023-08-24 15:26:25,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=15786, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14458, PETRI_PLACES=357, PETRI_TRANSITIONS=747} [2023-08-24 15:26:25,193 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-08-24 15:26:25,193 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 747 transitions, 14458 flow [2023-08-24 15:26:25,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.11764705882354) internal successors, (1702), 17 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 15:26:25,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:25,193 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 15:26:25,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-24 15:26:25,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-24 15:26:25,398 INFO L420 AbstractCegarLoop]: === Iteration 45 === 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 15:26:25,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash -819448920, now seen corresponding path program 4 times [2023-08-24 15:26:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:25,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53495326] [2023-08-24 15:26:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:25,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:25,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:25,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53495326] [2023-08-24 15:26:25,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53495326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:25,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917014270] [2023-08-24 15:26:25,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:26:25,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:25,468 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:25,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 15:26:25,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:26:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:25,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:26:25,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:25,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:25,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917014270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:25,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:25,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 15:26:25,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796864427] [2023-08-24 15:26:25,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:25,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 15:26:25,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 15:26:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-24 15:26:25,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:25,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 747 transitions, 14458 flow. Second operand has 16 states, 16 states have (on average 100.3125) internal successors, (1605), 16 states have internal predecessors, (1605), 0 states have call successors, (0), 0 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 15:26:25,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:25,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:25,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:27,101 INFO L124 PetriNetUnfolderBase]: 3419/5237 cut-off events. [2023-08-24 15:26:27,101 INFO L125 PetriNetUnfolderBase]: For 124142/124149 co-relation queries the response was YES. [2023-08-24 15:26:27,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50029 conditions, 5237 events. 3419/5237 cut-off events. For 124142/124149 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 29213 event pairs, 760 based on Foata normal form. 106/5338 useless extension candidates. Maximal degree in co-relation 49898. Up to 3791 conditions per place. [2023-08-24 15:26:27,149 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 701 selfloop transitions, 42 changer transitions 36/811 dead transitions. [2023-08-24 15:26:27,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 811 transitions, 16525 flow [2023-08-24 15:26:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:26:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:26:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1064 transitions. [2023-08-24 15:26:27,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384115523465704 [2023-08-24 15:26:27,150 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1064 transitions. [2023-08-24 15:26:27,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1064 transitions. [2023-08-24 15:26:27,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:27,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1064 transitions. [2023-08-24 15:26:27,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.4) internal successors, (1064), 10 states have internal predecessors, (1064), 0 states have call successors, (0), 0 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 15:26:27,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:27,153 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:27,153 INFO L175 Difference]: Start difference. First operand has 357 places, 747 transitions, 14458 flow. Second operand 10 states and 1064 transitions. [2023-08-24 15:26:27,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 811 transitions, 16525 flow [2023-08-24 15:26:27,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 811 transitions, 16201 flow, removed 72 selfloop flow, removed 12 redundant places. [2023-08-24 15:26:27,696 INFO L231 Difference]: Finished difference. Result has 347 places, 737 transitions, 14082 flow [2023-08-24 15:26:27,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=14142, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14082, PETRI_PLACES=347, PETRI_TRANSITIONS=737} [2023-08-24 15:26:27,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2023-08-24 15:26:27,696 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 737 transitions, 14082 flow [2023-08-24 15:26:27,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 100.3125) internal successors, (1605), 16 states have internal predecessors, (1605), 0 states have call successors, (0), 0 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 15:26:27,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:27,697 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 15:26:27,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:27,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:27,897 INFO L420 AbstractCegarLoop]: === Iteration 46 === 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 15:26:27,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1571832220, now seen corresponding path program 5 times [2023-08-24 15:26:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:27,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702200010] [2023-08-24 15:26:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:27,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:27,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702200010] [2023-08-24 15:26:27,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702200010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:27,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442611705] [2023-08-24 15:26:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:26:27,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:27,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:27,974 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:27,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 15:26:28,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:26:28,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:28,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:26:28,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:28,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:28,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442611705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:28,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:28,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 15:26:28,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937627195] [2023-08-24 15:26:28,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:28,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:26:28,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:28,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:26:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:26:28,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:28,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 737 transitions, 14082 flow. Second operand has 18 states, 18 states have (on average 100.16666666666667) internal successors, (1803), 18 states have internal predecessors, (1803), 0 states have call successors, (0), 0 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 15:26:28,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:28,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:28,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:29,474 INFO L124 PetriNetUnfolderBase]: 3101/4729 cut-off events. [2023-08-24 15:26:29,475 INFO L125 PetriNetUnfolderBase]: For 113886/113893 co-relation queries the response was YES. [2023-08-24 15:26:29,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45848 conditions, 4729 events. 3101/4729 cut-off events. For 113886/113893 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 25481 event pairs, 752 based on Foata normal form. 106/4830 useless extension candidates. Maximal degree in co-relation 45720. Up to 3791 conditions per place. [2023-08-24 15:26:29,524 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 653 selfloop transitions, 51 changer transitions 35/769 dead transitions. [2023-08-24 15:26:29,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 769 transitions, 15516 flow [2023-08-24 15:26:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:26:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:26:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1374 transitions. [2023-08-24 15:26:29,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815606775895585 [2023-08-24 15:26:29,526 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1374 transitions. [2023-08-24 15:26:29,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1374 transitions. [2023-08-24 15:26:29,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:29,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1374 transitions. [2023-08-24 15:26:29,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.6923076923077) internal successors, (1374), 13 states have internal predecessors, (1374), 0 states have call successors, (0), 0 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 15:26:29,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:26:29,529 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:26:29,529 INFO L175 Difference]: Start difference. First operand has 347 places, 737 transitions, 14082 flow. Second operand 13 states and 1374 transitions. [2023-08-24 15:26:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 769 transitions, 15516 flow [2023-08-24 15:26:30,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 769 transitions, 15121 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-08-24 15:26:30,098 INFO L231 Difference]: Finished difference. Result has 345 places, 684 transitions, 12982 flow [2023-08-24 15:26:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=13123, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12982, PETRI_PLACES=345, PETRI_TRANSITIONS=684} [2023-08-24 15:26:30,099 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 315 predicate places. [2023-08-24 15:26:30,099 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 684 transitions, 12982 flow [2023-08-24 15:26:30,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.16666666666667) internal successors, (1803), 18 states have internal predecessors, (1803), 0 states have call successors, (0), 0 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 15:26:30,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:30,099 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 15:26:30,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:30,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:30,300 INFO L420 AbstractCegarLoop]: === Iteration 47 === 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 15:26:30,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash -525068346, now seen corresponding path program 6 times [2023-08-24 15:26:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:30,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249754344] [2023-08-24 15:26:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:30,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249754344] [2023-08-24 15:26:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249754344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837919283] [2023-08-24 15:26:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:26:30,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:30,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:30,370 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:30,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 15:26:30,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:26:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:30,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 15:26:30,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:30,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:26:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837919283] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:30,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:30,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 15:26:30,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419039574] [2023-08-24 15:26:30,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:30,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 15:26:30,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 15:26:30,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-08-24 15:26:30,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 684 transitions, 12982 flow. Second operand has 17 states, 17 states have (on average 100.11764705882354) internal successors, (1702), 17 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 15:26:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:31,705 INFO L124 PetriNetUnfolderBase]: 2835/4299 cut-off events. [2023-08-24 15:26:31,705 INFO L125 PetriNetUnfolderBase]: For 105496/105559 co-relation queries the response was YES. [2023-08-24 15:26:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42004 conditions, 4299 events. 2835/4299 cut-off events. For 105496/105559 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 22552 event pairs, 746 based on Foata normal form. 133/4421 useless extension candidates. Maximal degree in co-relation 41879. Up to 3787 conditions per place. [2023-08-24 15:26:31,742 INFO L140 encePairwiseOnDemand]: 269/277 looper letters, 572 selfloop transitions, 3 changer transitions 86/683 dead transitions. [2023-08-24 15:26:31,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 683 transitions, 13777 flow [2023-08-24 15:26:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 15:26:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 15:26:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 946 transitions. [2023-08-24 15:26:31,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794624949859607 [2023-08-24 15:26:31,743 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 946 transitions. [2023-08-24 15:26:31,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 946 transitions. [2023-08-24 15:26:31,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:31,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 946 transitions. [2023-08-24 15:26:31,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 0 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 15:26:31,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:26:31,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 277.0) internal successors, (2770), 10 states have internal predecessors, (2770), 0 states have call successors, (0), 0 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 15:26:31,745 INFO L175 Difference]: Start difference. First operand has 345 places, 684 transitions, 12982 flow. Second operand 9 states and 946 transitions. [2023-08-24 15:26:31,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 683 transitions, 13777 flow [2023-08-24 15:26:32,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 683 transitions, 13506 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-24 15:26:32,101 INFO L231 Difference]: Finished difference. Result has 321 places, 597 transitions, 10710 flow [2023-08-24 15:26:32,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=12036, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10710, PETRI_PLACES=321, PETRI_TRANSITIONS=597} [2023-08-24 15:26:32,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2023-08-24 15:26:32,102 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 597 transitions, 10710 flow [2023-08-24 15:26:32,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 100.11764705882354) internal successors, (1702), 17 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 15:26:32,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:32,102 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] [2023-08-24 15:26:32,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:32,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-24 15:26:32,303 INFO L420 AbstractCegarLoop]: === Iteration 48 === 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 15:26:32,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2120417060, now seen corresponding path program 16 times [2023-08-24 15:26:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:32,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160948472] [2023-08-24 15:26:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:32,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:32,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160948472] [2023-08-24 15:26:32,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160948472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:32,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238703591] [2023-08-24 15:26:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:26:32,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:32,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:32,395 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:32,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 15:26:32,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:26:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:32,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:26:32,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:32,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:32,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238703591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:32,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:32,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-24 15:26:32,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895733421] [2023-08-24 15:26:32,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:32,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:26:32,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:26:32,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:26:32,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:32,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 597 transitions, 10710 flow. Second operand has 21 states, 21 states have (on average 100.0952380952381) internal successors, (2102), 21 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 15:26:32,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:32,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:32,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:34,069 INFO L124 PetriNetUnfolderBase]: 3493/5090 cut-off events. [2023-08-24 15:26:34,069 INFO L125 PetriNetUnfolderBase]: For 126323/126383 co-relation queries the response was YES. [2023-08-24 15:26:34,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50000 conditions, 5090 events. 3493/5090 cut-off events. For 126323/126383 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 25546 event pairs, 248 based on Foata normal form. 52/5138 useless extension candidates. Maximal degree in co-relation 49881. Up to 1549 conditions per place. [2023-08-24 15:26:34,117 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 717 selfloop transitions, 343 changer transitions 0/1082 dead transitions. [2023-08-24 15:26:34,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1082 transitions, 20829 flow [2023-08-24 15:26:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:26:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:26:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2014 transitions. [2023-08-24 15:26:34,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38267148014440433 [2023-08-24 15:26:34,119 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2014 transitions. [2023-08-24 15:26:34,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2014 transitions. [2023-08-24 15:26:34,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:34,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2014 transitions. [2023-08-24 15:26:34,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 106.0) internal successors, (2014), 19 states have internal predecessors, (2014), 0 states have call successors, (0), 0 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 15:26:34,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 277.0) internal successors, (5540), 20 states have internal predecessors, (5540), 0 states have call successors, (0), 0 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 15:26:34,123 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 277.0) internal successors, (5540), 20 states have internal predecessors, (5540), 0 states have call successors, (0), 0 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 15:26:34,123 INFO L175 Difference]: Start difference. First operand has 321 places, 597 transitions, 10710 flow. Second operand 19 states and 2014 transitions. [2023-08-24 15:26:34,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1082 transitions, 20829 flow [2023-08-24 15:26:34,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1082 transitions, 19991 flow, removed 310 selfloop flow, removed 11 redundant places. [2023-08-24 15:26:34,550 INFO L231 Difference]: Finished difference. Result has 304 places, 690 transitions, 12845 flow [2023-08-24 15:26:34,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12845, PETRI_PLACES=304, PETRI_TRANSITIONS=690} [2023-08-24 15:26:34,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 274 predicate places. [2023-08-24 15:26:34,551 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 690 transitions, 12845 flow [2023-08-24 15:26:34,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 100.0952380952381) internal successors, (2102), 21 states have internal predecessors, (2102), 0 states have call successors, (0), 0 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 15:26:34,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:34,551 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] [2023-08-24 15:26:34,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:34,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 15:26:34,757 INFO L420 AbstractCegarLoop]: === Iteration 49 === 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 15:26:34,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:34,757 INFO L85 PathProgramCache]: Analyzing trace with hash 438255836, now seen corresponding path program 16 times [2023-08-24 15:26:34,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:34,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72629613] [2023-08-24 15:26:34,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:34,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:34,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72629613] [2023-08-24 15:26:34,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72629613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:34,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546196237] [2023-08-24 15:26:34,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:26:34,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:34,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:34,831 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:34,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 15:26:34,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:26:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:34,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:26:34,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:35,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:35,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546196237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:35,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:35,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 15:26:35,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950520402] [2023-08-24 15:26:35,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:35,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:26:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:26:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:26:35,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:35,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 690 transitions, 12845 flow. Second operand has 18 states, 18 states have (on average 100.27777777777777) internal successors, (1805), 18 states have internal predecessors, (1805), 0 states have call successors, (0), 0 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 15:26:35,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:35,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:35,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:36,368 INFO L124 PetriNetUnfolderBase]: 4089/5949 cut-off events. [2023-08-24 15:26:36,369 INFO L125 PetriNetUnfolderBase]: For 154978/155036 co-relation queries the response was YES. [2023-08-24 15:26:36,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59467 conditions, 5949 events. 4089/5949 cut-off events. For 154978/155036 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30340 event pairs, 304 based on Foata normal form. 52/5992 useless extension candidates. Maximal degree in co-relation 59352. Up to 2173 conditions per place. [2023-08-24 15:26:36,430 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 538 selfloop transitions, 293 changer transitions 0/853 dead transitions. [2023-08-24 15:26:36,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 853 transitions, 17183 flow [2023-08-24 15:26:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:26:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:26:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1052 transitions. [2023-08-24 15:26:36,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37978339350180507 [2023-08-24 15:26:36,431 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1052 transitions. [2023-08-24 15:26:36,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1052 transitions. [2023-08-24 15:26:36,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:36,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1052 transitions. [2023-08-24 15:26:36,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 105.2) internal successors, (1052), 10 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 15:26:36,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:36,433 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:26:36,433 INFO L175 Difference]: Start difference. First operand has 304 places, 690 transitions, 12845 flow. Second operand 10 states and 1052 transitions. [2023-08-24 15:26:36,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 853 transitions, 17183 flow [2023-08-24 15:26:36,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 853 transitions, 15973 flow, removed 249 selfloop flow, removed 14 redundant places. [2023-08-24 15:26:36,981 INFO L231 Difference]: Finished difference. Result has 302 places, 720 transitions, 13284 flow [2023-08-24 15:26:36,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=11811, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13284, PETRI_PLACES=302, PETRI_TRANSITIONS=720} [2023-08-24 15:26:36,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2023-08-24 15:26:36,982 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 720 transitions, 13284 flow [2023-08-24 15:26:36,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 100.27777777777777) internal successors, (1805), 18 states have internal predecessors, (1805), 0 states have call successors, (0), 0 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 15:26:36,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:36,982 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] [2023-08-24 15:26:36,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:37,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 15:26:37,182 INFO L420 AbstractCegarLoop]: === Iteration 50 === 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 15:26:37,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1205782304, now seen corresponding path program 17 times [2023-08-24 15:26:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601497970] [2023-08-24 15:26:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:37,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:37,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601497970] [2023-08-24 15:26:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601497970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:37,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107878306] [2023-08-24 15:26:37,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:26:37,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:37,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:37,272 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:37,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 15:26:37,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:26:37,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:37,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:26:37,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:37,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107878306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:37,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:37,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 15:26:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969719468] [2023-08-24 15:26:37,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:37,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:26:37,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:26:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:26:37,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 277 [2023-08-24 15:26:37,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 720 transitions, 13284 flow. Second operand has 20 states, 20 states have (on average 96.45) internal successors, (1929), 20 states have internal predecessors, (1929), 0 states have call successors, (0), 0 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 15:26:37,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:37,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 277 [2023-08-24 15:26:37,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:39,470 INFO L124 PetriNetUnfolderBase]: 5641/8057 cut-off events. [2023-08-24 15:26:39,470 INFO L125 PetriNetUnfolderBase]: For 201941/201941 co-relation queries the response was YES. [2023-08-24 15:26:39,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80141 conditions, 8057 events. 5641/8057 cut-off events. For 201941/201941 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40243 event pairs, 532 based on Foata normal form. 55/8112 useless extension candidates. Maximal degree in co-relation 80029. Up to 2771 conditions per place. [2023-08-24 15:26:39,558 INFO L140 encePairwiseOnDemand]: 265/277 looper letters, 774 selfloop transitions, 491 changer transitions 0/1265 dead transitions. [2023-08-24 15:26:39,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1265 transitions, 25474 flow [2023-08-24 15:26:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:26:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:26:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2017 transitions. [2023-08-24 15:26:39,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640794223826715 [2023-08-24 15:26:39,559 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2017 transitions. [2023-08-24 15:26:39,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2017 transitions. [2023-08-24 15:26:39,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:39,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2017 transitions. [2023-08-24 15:26:39,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 100.85) internal successors, (2017), 20 states have internal predecessors, (2017), 0 states have call successors, (0), 0 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 15:26:39,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 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 15:26:39,564 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 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 15:26:39,564 INFO L175 Difference]: Start difference. First operand has 302 places, 720 transitions, 13284 flow. Second operand 20 states and 2017 transitions. [2023-08-24 15:26:39,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1265 transitions, 25474 flow [2023-08-24 15:26:40,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1265 transitions, 24577 flow, removed 238 selfloop flow, removed 6 redundant places. [2023-08-24 15:26:40,284 INFO L231 Difference]: Finished difference. Result has 324 places, 948 transitions, 18769 flow [2023-08-24 15:26:40,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=12860, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18769, PETRI_PLACES=324, PETRI_TRANSITIONS=948} [2023-08-24 15:26:40,285 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2023-08-24 15:26:40,285 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 948 transitions, 18769 flow [2023-08-24 15:26:40,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.45) internal successors, (1929), 20 states have internal predecessors, (1929), 0 states have call successors, (0), 0 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 15:26:40,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:40,285 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] [2023-08-24 15:26:40,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:40,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:40,491 INFO L420 AbstractCegarLoop]: === Iteration 51 === 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 15:26:40,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash -635380800, now seen corresponding path program 18 times [2023-08-24 15:26:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676256551] [2023-08-24 15:26:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:40,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:40,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676256551] [2023-08-24 15:26:40,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676256551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:40,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315778331] [2023-08-24 15:26:40,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:26:40,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:40,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:40,565 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:40,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 15:26:40,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:26:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:40,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:26:40,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:40,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315778331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:40,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:40,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 15:26:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426778791] [2023-08-24 15:26:40,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:40,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:26:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:26:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:26:40,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:40,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 948 transitions, 18769 flow. Second operand has 19 states, 19 states have (on average 100.3157894736842) internal successors, (1906), 19 states have internal predecessors, (1906), 0 states have call successors, (0), 0 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 15:26:40,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:40,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:40,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:43,112 INFO L124 PetriNetUnfolderBase]: 5669/8203 cut-off events. [2023-08-24 15:26:43,112 INFO L125 PetriNetUnfolderBase]: For 240960/240965 co-relation queries the response was YES. [2023-08-24 15:26:43,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86434 conditions, 8203 events. 5669/8203 cut-off events. For 240960/240965 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42344 event pairs, 721 based on Foata normal form. 123/8321 useless extension candidates. Maximal degree in co-relation 86313. Up to 4815 conditions per place. [2023-08-24 15:26:43,195 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 831 selfloop transitions, 541 changer transitions 0/1414 dead transitions. [2023-08-24 15:26:43,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1414 transitions, 30036 flow [2023-08-24 15:26:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:26:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:26:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1580 transitions. [2023-08-24 15:26:43,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802647412755716 [2023-08-24 15:26:43,196 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1580 transitions. [2023-08-24 15:26:43,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1580 transitions. [2023-08-24 15:26:43,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:43,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1580 transitions. [2023-08-24 15:26:43,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.33333333333333) internal successors, (1580), 15 states have internal predecessors, (1580), 0 states have call successors, (0), 0 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 15:26:43,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 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 15:26:43,200 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 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 15:26:43,200 INFO L175 Difference]: Start difference. First operand has 324 places, 948 transitions, 18769 flow. Second operand 15 states and 1580 transitions. [2023-08-24 15:26:43,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1414 transitions, 30036 flow [2023-08-24 15:26:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1414 transitions, 28935 flow, removed 547 selfloop flow, removed 5 redundant places. [2023-08-24 15:26:44,222 INFO L231 Difference]: Finished difference. Result has 334 places, 1087 transitions, 22372 flow [2023-08-24 15:26:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=18139, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22372, PETRI_PLACES=334, PETRI_TRANSITIONS=1087} [2023-08-24 15:26:44,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2023-08-24 15:26:44,223 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1087 transitions, 22372 flow [2023-08-24 15:26:44,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.3157894736842) internal successors, (1906), 19 states have internal predecessors, (1906), 0 states have call successors, (0), 0 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 15:26:44,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:44,223 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] [2023-08-24 15:26:44,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:44,424 INFO L420 AbstractCegarLoop]: === Iteration 52 === 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 15:26:44,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1331826024, now seen corresponding path program 17 times [2023-08-24 15:26:44,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:44,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377358395] [2023-08-24 15:26:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:44,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:44,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377358395] [2023-08-24 15:26:44,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377358395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:44,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902401030] [2023-08-24 15:26:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:26:44,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:44,499 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:44,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 15:26:44,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:26:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:44,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 15:26:44,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:44,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902401030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:44,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:44,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-08-24 15:26:44,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160777760] [2023-08-24 15:26:44,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:44,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 15:26:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 15:26:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-24 15:26:44,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 277 [2023-08-24 15:26:44,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1087 transitions, 22372 flow. Second operand has 16 states, 16 states have (on average 96.6875) internal successors, (1547), 16 states have internal predecessors, (1547), 0 states have call successors, (0), 0 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 15:26:44,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:44,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 277 [2023-08-24 15:26:44,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:47,261 INFO L124 PetriNetUnfolderBase]: 5698/8229 cut-off events. [2023-08-24 15:26:47,261 INFO L125 PetriNetUnfolderBase]: For 235864/235864 co-relation queries the response was YES. [2023-08-24 15:26:47,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87797 conditions, 8229 events. 5698/8229 cut-off events. For 235864/235864 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 42109 event pairs, 578 based on Foata normal form. 42/8271 useless extension candidates. Maximal degree in co-relation 87672. Up to 3288 conditions per place. [2023-08-24 15:26:47,355 INFO L140 encePairwiseOnDemand]: 265/277 looper letters, 853 selfloop transitions, 411 changer transitions 0/1264 dead transitions. [2023-08-24 15:26:47,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1264 transitions, 28134 flow [2023-08-24 15:26:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:26:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:26:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2018 transitions. [2023-08-24 15:26:47,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36425992779783395 [2023-08-24 15:26:47,357 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2018 transitions. [2023-08-24 15:26:47,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2018 transitions. [2023-08-24 15:26:47,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:47,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2018 transitions. [2023-08-24 15:26:47,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 100.9) internal successors, (2018), 20 states have internal predecessors, (2018), 0 states have call successors, (0), 0 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 15:26:47,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 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 15:26:47,361 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 277.0) internal successors, (5817), 21 states have internal predecessors, (5817), 0 states have call successors, (0), 0 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 15:26:47,361 INFO L175 Difference]: Start difference. First operand has 334 places, 1087 transitions, 22372 flow. Second operand 20 states and 2018 transitions. [2023-08-24 15:26:47,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1264 transitions, 28134 flow [2023-08-24 15:26:48,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1264 transitions, 26785 flow, removed 401 selfloop flow, removed 11 redundant places. [2023-08-24 15:26:48,664 INFO L231 Difference]: Finished difference. Result has 340 places, 1099 transitions, 22385 flow [2023-08-24 15:26:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=20887, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22385, PETRI_PLACES=340, PETRI_TRANSITIONS=1099} [2023-08-24 15:26:48,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 310 predicate places. [2023-08-24 15:26:48,665 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1099 transitions, 22385 flow [2023-08-24 15:26:48,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 96.6875) internal successors, (1547), 16 states have internal predecessors, (1547), 0 states have call successors, (0), 0 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 15:26:48,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:48,665 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] [2023-08-24 15:26:48,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:48,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:48,865 INFO L420 AbstractCegarLoop]: === Iteration 53 === 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 15:26:48,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash -588776872, now seen corresponding path program 19 times [2023-08-24 15:26:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:48,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545506518] [2023-08-24 15:26:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:48,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:48,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545506518] [2023-08-24 15:26:48,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545506518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:48,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266292431] [2023-08-24 15:26:48,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:26:48,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:48,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:48,953 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:48,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 15:26:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:49,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:26:49,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:49,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266292431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:49,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:49,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 15:26:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527143929] [2023-08-24 15:26:49,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:49,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:26:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:26:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:26:49,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:49,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1099 transitions, 22385 flow. Second operand has 20 states, 20 states have (on average 100.15) internal successors, (2003), 20 states have internal predecessors, (2003), 0 states have call successors, (0), 0 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 15:26:49,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:49,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:49,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:51,493 INFO L124 PetriNetUnfolderBase]: 5559/7995 cut-off events. [2023-08-24 15:26:51,493 INFO L125 PetriNetUnfolderBase]: For 219500/219502 co-relation queries the response was YES. [2023-08-24 15:26:51,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85274 conditions, 7995 events. 5559/7995 cut-off events. For 219500/219502 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40421 event pairs, 738 based on Foata normal form. 142/8136 useless extension candidates. Maximal degree in co-relation 85148. Up to 4829 conditions per place. [2023-08-24 15:26:51,589 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 789 selfloop transitions, 553 changer transitions 0/1384 dead transitions. [2023-08-24 15:26:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1384 transitions, 29996 flow [2023-08-24 15:26:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:26:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:26:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1574 transitions. [2023-08-24 15:26:51,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378820697954272 [2023-08-24 15:26:51,591 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1574 transitions. [2023-08-24 15:26:51,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1574 transitions. [2023-08-24 15:26:51,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:51,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1574 transitions. [2023-08-24 15:26:51,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 104.93333333333334) internal successors, (1574), 15 states have internal predecessors, (1574), 0 states have call successors, (0), 0 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 15:26:51,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 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 15:26:51,594 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 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 15:26:51,594 INFO L175 Difference]: Start difference. First operand has 340 places, 1099 transitions, 22385 flow. Second operand 15 states and 1574 transitions. [2023-08-24 15:26:51,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1384 transitions, 29996 flow [2023-08-24 15:26:52,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1384 transitions, 29286 flow, removed 114 selfloop flow, removed 11 redundant places. [2023-08-24 15:26:52,775 INFO L231 Difference]: Finished difference. Result has 343 places, 1096 transitions, 22798 flow [2023-08-24 15:26:52,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21367, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22798, PETRI_PLACES=343, PETRI_TRANSITIONS=1096} [2023-08-24 15:26:52,776 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2023-08-24 15:26:52,776 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1096 transitions, 22798 flow [2023-08-24 15:26:52,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.15) internal successors, (2003), 20 states have internal predecessors, (2003), 0 states have call successors, (0), 0 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 15:26:52,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:52,776 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] [2023-08-24 15:26:52,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:52,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-24 15:26:52,981 INFO L420 AbstractCegarLoop]: === Iteration 54 === 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 15:26:52,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash 581720932, now seen corresponding path program 18 times [2023-08-24 15:26:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:52,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333289238] [2023-08-24 15:26:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:52,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:53,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333289238] [2023-08-24 15:26:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333289238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761697386] [2023-08-24 15:26:53,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:26:53,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:53,061 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:53,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 15:26:53,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:26:53,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:26:53,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:26:53,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:53,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:26:53,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761697386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:53,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:53,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 15:26:53,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654504141] [2023-08-24 15:26:53,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:53,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:26:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:26:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:26:53,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:53,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1096 transitions, 22798 flow. Second operand has 21 states, 21 states have (on average 99.95238095238095) internal successors, (2099), 21 states have internal predecessors, (2099), 0 states have call successors, (0), 0 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 15:26:53,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:55,762 INFO L124 PetriNetUnfolderBase]: 5513/7911 cut-off events. [2023-08-24 15:26:55,762 INFO L125 PetriNetUnfolderBase]: For 209643/209645 co-relation queries the response was YES. [2023-08-24 15:26:55,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85625 conditions, 7911 events. 5513/7911 cut-off events. For 209643/209645 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39672 event pairs, 399 based on Foata normal form. 57/7967 useless extension candidates. Maximal degree in co-relation 85501. Up to 2683 conditions per place. [2023-08-24 15:26:55,854 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 834 selfloop transitions, 518 changer transitions 0/1394 dead transitions. [2023-08-24 15:26:55,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1394 transitions, 30738 flow [2023-08-24 15:26:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 15:26:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 15:26:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1909 transitions. [2023-08-24 15:26:55,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38287204171680705 [2023-08-24 15:26:55,857 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1909 transitions. [2023-08-24 15:26:55,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1909 transitions. [2023-08-24 15:26:55,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:26:55,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1909 transitions. [2023-08-24 15:26:55,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 106.05555555555556) internal successors, (1909), 18 states have internal predecessors, (1909), 0 states have call successors, (0), 0 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 15:26:55,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 0 states have call successors, (0), 0 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 15:26:55,864 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 0 states have call successors, (0), 0 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 15:26:55,865 INFO L175 Difference]: Start difference. First operand has 343 places, 1096 transitions, 22798 flow. Second operand 18 states and 1909 transitions. [2023-08-24 15:26:55,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1394 transitions, 30738 flow [2023-08-24 15:26:56,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1394 transitions, 29700 flow, removed 54 selfloop flow, removed 14 redundant places. [2023-08-24 15:26:57,017 INFO L231 Difference]: Finished difference. Result has 347 places, 1093 transitions, 22870 flow [2023-08-24 15:26:57,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21707, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22870, PETRI_PLACES=347, PETRI_TRANSITIONS=1093} [2023-08-24 15:26:57,017 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 317 predicate places. [2023-08-24 15:26:57,017 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1093 transitions, 22870 flow [2023-08-24 15:26:57,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.95238095238095) internal successors, (2099), 21 states have internal predecessors, (2099), 0 states have call successors, (0), 0 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 15:26:57,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:26:57,018 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] [2023-08-24 15:26:57,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-24 15:26:57,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-24 15:26:57,223 INFO L420 AbstractCegarLoop]: === Iteration 55 === 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 15:26:57,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:26:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1817385168, now seen corresponding path program 19 times [2023-08-24 15:26:57,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:26:57,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467278467] [2023-08-24 15:26:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:26:57,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:26:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:57,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:26:57,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467278467] [2023-08-24 15:26:57,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467278467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:26:57,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853954718] [2023-08-24 15:26:57,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:26:57,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:26:57,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:26:57,318 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:26:57,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 15:26:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:26:57,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:26:57,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:26:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:57,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:26:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:26:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853954718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:26:57,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:26:57,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 15:26:57,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517494772] [2023-08-24 15:26:57,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:26:57,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:26:57,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:26:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:26:57,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:26:57,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:26:57,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1093 transitions, 22870 flow. Second operand has 20 states, 20 states have (on average 100.2) internal successors, (2004), 20 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 15:26:57,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:26:57,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:26:57,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:26:59,965 INFO L124 PetriNetUnfolderBase]: 5525/7930 cut-off events. [2023-08-24 15:26:59,965 INFO L125 PetriNetUnfolderBase]: For 216700/216702 co-relation queries the response was YES. [2023-08-24 15:27:00,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86241 conditions, 7930 events. 5525/7930 cut-off events. For 216700/216702 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39763 event pairs, 1143 based on Foata normal form. 38/7965 useless extension candidates. Maximal degree in co-relation 86118. Up to 6594 conditions per place. [2023-08-24 15:27:00,054 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 867 selfloop transitions, 249 changer transitions 0/1157 dead transitions. [2023-08-24 15:27:00,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1157 transitions, 26288 flow [2023-08-24 15:27:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 15:27:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 15:27:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1147 transitions. [2023-08-24 15:27:00,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37643583852970136 [2023-08-24 15:27:00,056 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1147 transitions. [2023-08-24 15:27:00,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1147 transitions. [2023-08-24 15:27:00,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:00,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1147 transitions. [2023-08-24 15:27:00,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.27272727272727) internal successors, (1147), 11 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:27:00,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 277.0) internal successors, (3324), 12 states have internal predecessors, (3324), 0 states have call successors, (0), 0 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 15:27:00,058 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 277.0) internal successors, (3324), 12 states have internal predecessors, (3324), 0 states have call successors, (0), 0 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 15:27:00,058 INFO L175 Difference]: Start difference. First operand has 347 places, 1093 transitions, 22870 flow. Second operand 11 states and 1147 transitions. [2023-08-24 15:27:00,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1157 transitions, 26288 flow [2023-08-24 15:27:01,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1157 transitions, 25444 flow, removed 7 selfloop flow, removed 16 redundant places. [2023-08-24 15:27:01,189 INFO L231 Difference]: Finished difference. Result has 341 places, 1086 transitions, 22567 flow [2023-08-24 15:27:01,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21864, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22567, PETRI_PLACES=341, PETRI_TRANSITIONS=1086} [2023-08-24 15:27:01,189 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2023-08-24 15:27:01,190 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1086 transitions, 22567 flow [2023-08-24 15:27:01,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.2) internal successors, (2004), 20 states have internal predecessors, (2004), 0 states have call successors, (0), 0 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 15:27:01,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:01,190 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] [2023-08-24 15:27:01,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-24 15:27:01,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:01,390 INFO L420 AbstractCegarLoop]: === Iteration 56 === 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 15:27:01,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1241112472, now seen corresponding path program 20 times [2023-08-24 15:27:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:01,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942542140] [2023-08-24 15:27:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:27:01,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942542140] [2023-08-24 15:27:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942542140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340573508] [2023-08-24 15:27:01,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:27:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:01,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:01,482 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:01,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 15:27:01,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:27:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:01,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:27:01,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:27:01,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:27:01,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340573508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:01,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 15:27:01,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537080753] [2023-08-24 15:27:01,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:27:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:27:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:27:01,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:27:01,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1086 transitions, 22567 flow. Second operand has 20 states, 20 states have (on average 100.1) internal successors, (2002), 20 states have internal predecessors, (2002), 0 states have call successors, (0), 0 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 15:27:01,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:01,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:27:01,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:04,020 INFO L124 PetriNetUnfolderBase]: 5610/8086 cut-off events. [2023-08-24 15:27:04,020 INFO L125 PetriNetUnfolderBase]: For 223020/223022 co-relation queries the response was YES. [2023-08-24 15:27:04,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87137 conditions, 8086 events. 5610/8086 cut-off events. For 223020/223022 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40798 event pairs, 611 based on Foata normal form. 12/8097 useless extension candidates. Maximal degree in co-relation 87013. Up to 3085 conditions per place. [2023-08-24 15:27:04,116 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 777 selfloop transitions, 426 changer transitions 0/1244 dead transitions. [2023-08-24 15:27:04,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1244 transitions, 27723 flow [2023-08-24 15:27:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:27:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:27:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1048 transitions. [2023-08-24 15:27:04,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783393501805054 [2023-08-24 15:27:04,117 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1048 transitions. [2023-08-24 15:27:04,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1048 transitions. [2023-08-24 15:27:04,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:04,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1048 transitions. [2023-08-24 15:27:04,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 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 15:27:04,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:27:04,120 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 277.0) internal successors, (3047), 11 states have internal predecessors, (3047), 0 states have call successors, (0), 0 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 15:27:04,120 INFO L175 Difference]: Start difference. First operand has 341 places, 1086 transitions, 22567 flow. Second operand 10 states and 1048 transitions. [2023-08-24 15:27:04,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1244 transitions, 27723 flow [2023-08-24 15:27:05,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1244 transitions, 27130 flow, removed 19 selfloop flow, removed 11 redundant places. [2023-08-24 15:27:05,321 INFO L231 Difference]: Finished difference. Result has 338 places, 1083 transitions, 22725 flow [2023-08-24 15:27:05,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21873, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22725, PETRI_PLACES=338, PETRI_TRANSITIONS=1083} [2023-08-24 15:27:05,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2023-08-24 15:27:05,322 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1083 transitions, 22725 flow [2023-08-24 15:27:05,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.1) internal successors, (2002), 20 states have internal predecessors, (2002), 0 states have call successors, (0), 0 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 15:27:05,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:05,322 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] [2023-08-24 15:27:05,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-24 15:27:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-24 15:27:05,522 INFO L420 AbstractCegarLoop]: === Iteration 57 === 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 15:27:05,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 110201336, now seen corresponding path program 21 times [2023-08-24 15:27:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264535545] [2023-08-24 15:27:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:05,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:05,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264535545] [2023-08-24 15:27:05,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264535545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:05,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015646812] [2023-08-24 15:27:05,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:27:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:05,599 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:05,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-24 15:27:05,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:27:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:05,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:27:05,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:05,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:05,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015646812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:05,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:05,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 15:27:05,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742949028] [2023-08-24 15:27:05,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:27:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:27:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:27:05,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:27:05,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1083 transitions, 22725 flow. Second operand has 19 states, 19 states have (on average 100.05263157894737) internal successors, (1901), 19 states have internal predecessors, (1901), 0 states have call successors, (0), 0 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 15:27:05,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:05,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:27:05,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:08,252 INFO L124 PetriNetUnfolderBase]: 5573/8023 cut-off events. [2023-08-24 15:27:08,253 INFO L125 PetriNetUnfolderBase]: For 224286/224288 co-relation queries the response was YES. [2023-08-24 15:27:08,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87298 conditions, 8023 events. 5573/8023 cut-off events. For 224286/224288 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40282 event pairs, 989 based on Foata normal form. 28/8048 useless extension candidates. Maximal degree in co-relation 87175. Up to 5227 conditions per place. [2023-08-24 15:27:08,334 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 839 selfloop transitions, 362 changer transitions 0/1242 dead transitions. [2023-08-24 15:27:08,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1242 transitions, 27947 flow [2023-08-24 15:27:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 15:27:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 15:27:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1257 transitions. [2023-08-24 15:27:08,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37815884476534295 [2023-08-24 15:27:08,336 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1257 transitions. [2023-08-24 15:27:08,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1257 transitions. [2023-08-24 15:27:08,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:08,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1257 transitions. [2023-08-24 15:27:08,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 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 15:27:08,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 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 15:27:08,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 277.0) internal successors, (3601), 13 states have internal predecessors, (3601), 0 states have call successors, (0), 0 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 15:27:08,338 INFO L175 Difference]: Start difference. First operand has 338 places, 1083 transitions, 22725 flow. Second operand 12 states and 1257 transitions. [2023-08-24 15:27:08,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1242 transitions, 27947 flow [2023-08-24 15:27:09,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1242 transitions, 27164 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 15:27:09,352 INFO L231 Difference]: Finished difference. Result has 342 places, 1089 transitions, 22879 flow [2023-08-24 15:27:09,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21954, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22879, PETRI_PLACES=342, PETRI_TRANSITIONS=1089} [2023-08-24 15:27:09,352 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2023-08-24 15:27:09,352 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 1089 transitions, 22879 flow [2023-08-24 15:27:09,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.05263157894737) internal successors, (1901), 19 states have internal predecessors, (1901), 0 states have call successors, (0), 0 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 15:27:09,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:09,353 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] [2023-08-24 15:27:09,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-24 15:27:09,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-24 15:27:09,553 INFO L420 AbstractCegarLoop]: === Iteration 58 === 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 15:27:09,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:09,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1443984768, now seen corresponding path program 20 times [2023-08-24 15:27:09,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:09,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577713959] [2023-08-24 15:27:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:09,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577713959] [2023-08-24 15:27:09,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577713959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695075535] [2023-08-24 15:27:09,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:27:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:09,632 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:09,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-24 15:27:09,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:27:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:09,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 15:27:09,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:09,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695075535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:09,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:09,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 15:27:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797877709] [2023-08-24 15:27:09,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:27:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:27:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:27:09,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 277 [2023-08-24 15:27:09,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 1089 transitions, 22879 flow. Second operand has 20 states, 20 states have (on average 99.9) internal successors, (1998), 20 states have internal predecessors, (1998), 0 states have call successors, (0), 0 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 15:27:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:09,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 277 [2023-08-24 15:27:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:12,203 INFO L124 PetriNetUnfolderBase]: 5530/7946 cut-off events. [2023-08-24 15:27:12,203 INFO L125 PetriNetUnfolderBase]: For 219929/219931 co-relation queries the response was YES. [2023-08-24 15:27:12,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86780 conditions, 7946 events. 5530/7946 cut-off events. For 219929/219931 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39611 event pairs, 1021 based on Foata normal form. 31/7974 useless extension candidates. Maximal degree in co-relation 86656. Up to 5293 conditions per place. [2023-08-24 15:27:12,298 INFO L140 encePairwiseOnDemand]: 268/277 looper letters, 837 selfloop transitions, 370 changer transitions 0/1247 dead transitions. [2023-08-24 15:27:12,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1247 transitions, 27987 flow [2023-08-24 15:27:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:27:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:27:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1359 transitions. [2023-08-24 15:27:12,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773951680088864 [2023-08-24 15:27:12,300 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1359 transitions. [2023-08-24 15:27:12,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1359 transitions. [2023-08-24 15:27:12,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:12,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1359 transitions. [2023-08-24 15:27:12,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 104.53846153846153) internal successors, (1359), 13 states have internal predecessors, (1359), 0 states have call successors, (0), 0 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 15:27:12,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:27:12,302 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 277.0) internal successors, (3878), 14 states have internal predecessors, (3878), 0 states have call successors, (0), 0 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 15:27:12,303 INFO L175 Difference]: Start difference. First operand has 342 places, 1089 transitions, 22879 flow. Second operand 13 states and 1359 transitions. [2023-08-24 15:27:12,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1247 transitions, 27987 flow [2023-08-24 15:27:13,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1247 transitions, 26949 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-08-24 15:27:13,502 INFO L231 Difference]: Finished difference. Result has 344 places, 1102 transitions, 22932 flow [2023-08-24 15:27:13,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=21816, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22932, PETRI_PLACES=344, PETRI_TRANSITIONS=1102} [2023-08-24 15:27:13,503 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2023-08-24 15:27:13,503 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1102 transitions, 22932 flow [2023-08-24 15:27:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.9) internal successors, (1998), 20 states have internal predecessors, (1998), 0 states have call successors, (0), 0 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 15:27:13,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:13,503 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] [2023-08-24 15:27:13,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-24 15:27:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:13,704 INFO L420 AbstractCegarLoop]: === Iteration 59 === 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 15:27:13,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1311201379, now seen corresponding path program 21 times [2023-08-24 15:27:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:13,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239328] [2023-08-24 15:27:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:13,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:14,265 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 15:27:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239328] [2023-08-24 15:27:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959664523] [2023-08-24 15:27:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:27:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:14,267 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:14,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-24 15:27:14,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:27:14,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:14,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 15:27:14,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:14,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:27:14,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-24 15:27:14,962 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 15:27:14,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:15,241 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:27:15,242 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 38 treesize of output 54 [2023-08-24 15:27:15,508 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 15:27:15,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959664523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:15,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:15,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-08-24 15:27:15,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142001917] [2023-08-24 15:27:15,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:15,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 15:27:15,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:15,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 15:27:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 15:27:15,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 277 [2023-08-24 15:27:15,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1102 transitions, 22932 flow. Second operand has 38 states, 38 states have (on average 70.94736842105263) internal successors, (2696), 38 states have internal predecessors, (2696), 0 states have call successors, (0), 0 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 15:27:15,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:15,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 277 [2023-08-24 15:27:15,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:21,407 INFO L124 PetriNetUnfolderBase]: 8598/12386 cut-off events. [2023-08-24 15:27:21,407 INFO L125 PetriNetUnfolderBase]: For 370344/370344 co-relation queries the response was YES. [2023-08-24 15:27:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139858 conditions, 12386 events. 8598/12386 cut-off events. For 370344/370344 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 67328 event pairs, 656 based on Foata normal form. 3/12389 useless extension candidates. Maximal degree in co-relation 139733. Up to 8765 conditions per place. [2023-08-24 15:27:21,558 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 1310 selfloop transitions, 993 changer transitions 15/2318 dead transitions. [2023-08-24 15:27:21,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 2318 transitions, 53246 flow [2023-08-24 15:27:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 15:27:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 15:27:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3301 transitions. [2023-08-24 15:27:21,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28373732164345883 [2023-08-24 15:27:21,561 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3301 transitions. [2023-08-24 15:27:21,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3301 transitions. [2023-08-24 15:27:21,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:21,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3301 transitions. [2023-08-24 15:27:21,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 78.5952380952381) internal successors, (3301), 42 states have internal predecessors, (3301), 0 states have call successors, (0), 0 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 15:27:21,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 277.0) internal successors, (11911), 43 states have internal predecessors, (11911), 0 states have call successors, (0), 0 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 15:27:21,568 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 277.0) internal successors, (11911), 43 states have internal predecessors, (11911), 0 states have call successors, (0), 0 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 15:27:21,568 INFO L175 Difference]: Start difference. First operand has 344 places, 1102 transitions, 22932 flow. Second operand 42 states and 3301 transitions. [2023-08-24 15:27:21,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 2318 transitions, 53246 flow [2023-08-24 15:27:24,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 2318 transitions, 51508 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-08-24 15:27:24,317 INFO L231 Difference]: Finished difference. Result has 406 places, 1855 transitions, 44864 flow [2023-08-24 15:27:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=22134, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=44864, PETRI_PLACES=406, PETRI_TRANSITIONS=1855} [2023-08-24 15:27:24,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 376 predicate places. [2023-08-24 15:27:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1855 transitions, 44864 flow [2023-08-24 15:27:24,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.94736842105263) internal successors, (2696), 38 states have internal predecessors, (2696), 0 states have call successors, (0), 0 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 15:27:24,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:24,318 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] [2023-08-24 15:27:24,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-24 15:27:24,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:24,519 INFO L420 AbstractCegarLoop]: === Iteration 60 === 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 15:27:24,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:24,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1313912093, now seen corresponding path program 7 times [2023-08-24 15:27:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725821721] [2023-08-24 15:27:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:24,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:24,933 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 15:27:24,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725821721] [2023-08-24 15:27:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725821721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576742152] [2023-08-24 15:27:24,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:27:24,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:24,937 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:24,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-24 15:27:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:25,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-24 15:27:25,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:25,372 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:27:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:27:25,374 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:27:25,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-08-24 15:27:25,393 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 15:27:25,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:25,745 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:27:25,745 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 39 treesize of output 47 [2023-08-24 15:27:25,791 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:27:25,791 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 21 treesize of output 12 [2023-08-24 15:27:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:25,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576742152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:25,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:25,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-08-24 15:27:25,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375483723] [2023-08-24 15:27:25,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:25,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:27:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:27:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:27:25,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:27:25,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1855 transitions, 44864 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 15:27:25,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:25,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:27:25,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:32,053 INFO L124 PetriNetUnfolderBase]: 8861/12820 cut-off events. [2023-08-24 15:27:32,054 INFO L125 PetriNetUnfolderBase]: For 431035/431035 co-relation queries the response was YES. [2023-08-24 15:27:32,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152839 conditions, 12820 events. 8861/12820 cut-off events. For 431035/431035 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 70565 event pairs, 849 based on Foata normal form. 2/12822 useless extension candidates. Maximal degree in co-relation 152682. Up to 10511 conditions per place. [2023-08-24 15:27:32,232 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 1584 selfloop transitions, 600 changer transitions 3/2187 dead transitions. [2023-08-24 15:27:32,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 2187 transitions, 54697 flow [2023-08-24 15:27:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 15:27:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 15:27:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2237 transitions. [2023-08-24 15:27:32,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32303249097472925 [2023-08-24 15:27:32,234 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2237 transitions. [2023-08-24 15:27:32,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2237 transitions. [2023-08-24 15:27:32,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:32,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2237 transitions. [2023-08-24 15:27:32,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 89.48) internal successors, (2237), 25 states have internal predecessors, (2237), 0 states have call successors, (0), 0 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 15:27:32,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 277.0) internal successors, (7202), 26 states have internal predecessors, (7202), 0 states have call successors, (0), 0 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 15:27:32,239 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 277.0) internal successors, (7202), 26 states have internal predecessors, (7202), 0 states have call successors, (0), 0 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 15:27:32,239 INFO L175 Difference]: Start difference. First operand has 406 places, 1855 transitions, 44864 flow. Second operand 25 states and 2237 transitions. [2023-08-24 15:27:32,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 2187 transitions, 54697 flow [2023-08-24 15:27:36,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 2187 transitions, 50247 flow, removed 2223 selfloop flow, removed 2 redundant places. [2023-08-24 15:27:36,721 INFO L231 Difference]: Finished difference. Result has 436 places, 1914 transitions, 43826 flow [2023-08-24 15:27:36,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=40964, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=43826, PETRI_PLACES=436, PETRI_TRANSITIONS=1914} [2023-08-24 15:27:36,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 406 predicate places. [2023-08-24 15:27:36,722 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 1914 transitions, 43826 flow [2023-08-24 15:27:36,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 15:27:36,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:36,722 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] [2023-08-24 15:27:36,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-24 15:27:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-24 15:27:36,927 INFO L420 AbstractCegarLoop]: === Iteration 61 === 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 15:27:36,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1250262239, now seen corresponding path program 8 times [2023-08-24 15:27:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329767011] [2023-08-24 15:27:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:37,875 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 15:27:37,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:37,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329767011] [2023-08-24 15:27:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329767011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:37,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262998055] [2023-08-24 15:27:37,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:27:37,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:37,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:37,877 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:37,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-24 15:27:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:27:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:38,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-24 15:27:38,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:38,391 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:27:38,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-24 15:27:38,457 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 15:27:38,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:38,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:27:38,668 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 38 treesize of output 54 [2023-08-24 15:27:38,934 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 15:27:38,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262998055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:38,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:38,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-08-24 15:27:38,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778880809] [2023-08-24 15:27:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 15:27:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 15:27:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 15:27:38,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 277 [2023-08-24 15:27:38,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 1914 transitions, 43826 flow. Second operand has 35 states, 35 states have (on average 70.94285714285714) internal successors, (2483), 35 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 15:27:38,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:38,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 277 [2023-08-24 15:27:38,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:27:47,593 INFO L124 PetriNetUnfolderBase]: 11119/16032 cut-off events. [2023-08-24 15:27:47,593 INFO L125 PetriNetUnfolderBase]: For 512553/512553 co-relation queries the response was YES. [2023-08-24 15:27:47,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182111 conditions, 16032 events. 11119/16032 cut-off events. For 512553/512553 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 90963 event pairs, 958 based on Foata normal form. 6/16038 useless extension candidates. Maximal degree in co-relation 181945. Up to 12143 conditions per place. [2023-08-24 15:27:47,792 INFO L140 encePairwiseOnDemand]: 261/277 looper letters, 1772 selfloop transitions, 859 changer transitions 4/2635 dead transitions. [2023-08-24 15:27:47,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2635 transitions, 63701 flow [2023-08-24 15:27:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 15:27:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 15:27:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2373 transitions. [2023-08-24 15:27:47,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2855595667870036 [2023-08-24 15:27:47,793 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2373 transitions. [2023-08-24 15:27:47,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2373 transitions. [2023-08-24 15:27:47,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:27:47,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2373 transitions. [2023-08-24 15:27:47,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 79.1) internal successors, (2373), 30 states have internal predecessors, (2373), 0 states have call successors, (0), 0 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 15:27:47,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 277.0) internal successors, (8587), 31 states have internal predecessors, (8587), 0 states have call successors, (0), 0 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 15:27:47,799 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 277.0) internal successors, (8587), 31 states have internal predecessors, (8587), 0 states have call successors, (0), 0 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 15:27:47,799 INFO L175 Difference]: Start difference. First operand has 436 places, 1914 transitions, 43826 flow. Second operand 30 states and 2373 transitions. [2023-08-24 15:27:47,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2635 transitions, 63701 flow [2023-08-24 15:27:53,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 2635 transitions, 62271 flow, removed 355 selfloop flow, removed 14 redundant places. [2023-08-24 15:27:53,070 INFO L231 Difference]: Finished difference. Result has 471 places, 2364 transitions, 56781 flow [2023-08-24 15:27:53,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=42431, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=56781, PETRI_PLACES=471, PETRI_TRANSITIONS=2364} [2023-08-24 15:27:53,072 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 441 predicate places. [2023-08-24 15:27:53,072 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 2364 transitions, 56781 flow [2023-08-24 15:27:53,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.94285714285714) internal successors, (2483), 35 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 15:27:53,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:27:53,072 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] [2023-08-24 15:27:53,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-24 15:27:53,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:53,273 INFO L420 AbstractCegarLoop]: === Iteration 62 === 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 15:27:53,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:27:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 555008965, now seen corresponding path program 9 times [2023-08-24 15:27:53,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:27:53,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979891647] [2023-08-24 15:27:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:27:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:27:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:27:53,713 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 15:27:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:27:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979891647] [2023-08-24 15:27:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979891647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:27:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592372442] [2023-08-24 15:27:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:27:53,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:27:53,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:27:53,714 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:27:53,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-24 15:27:53,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:27:53,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:27:53,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-24 15:27:53,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:27:54,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:27:54,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:27:54,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-08-24 15:27:54,161 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 15:27:54,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:27:54,500 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:27:54,500 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 39 treesize of output 47 [2023-08-24 15:27:54,560 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:27:54,560 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 21 treesize of output 12 [2023-08-24 15:27:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:27:54,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592372442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:27:54,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:27:54,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-08-24 15:27:54,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652953619] [2023-08-24 15:27:54,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:27:54,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:27:54,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:27:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:27:54,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:27:54,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:27:54,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 2364 transitions, 56781 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 15:27:54,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:27:54,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:27:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:28:03,354 INFO L124 PetriNetUnfolderBase]: 11289/16291 cut-off events. [2023-08-24 15:28:03,354 INFO L125 PetriNetUnfolderBase]: For 581549/581549 co-relation queries the response was YES. [2023-08-24 15:28:03,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194759 conditions, 16291 events. 11289/16291 cut-off events. For 581549/581549 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 93178 event pairs, 1161 based on Foata normal form. 2/16293 useless extension candidates. Maximal degree in co-relation 194572. Up to 14228 conditions per place. [2023-08-24 15:28:03,575 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 2018 selfloop transitions, 591 changer transitions 2/2611 dead transitions. [2023-08-24 15:28:03,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 2611 transitions, 65952 flow [2023-08-24 15:28:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 15:28:03,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 15:28:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2053 transitions. [2023-08-24 15:28:03,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32224140637262594 [2023-08-24 15:28:03,577 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2053 transitions. [2023-08-24 15:28:03,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2053 transitions. [2023-08-24 15:28:03,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:28:03,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2053 transitions. [2023-08-24 15:28:03,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.26086956521739) internal successors, (2053), 23 states have internal predecessors, (2053), 0 states have call successors, (0), 0 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 15:28:03,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 277.0) internal successors, (6648), 24 states have internal predecessors, (6648), 0 states have call successors, (0), 0 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 15:28:03,582 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 277.0) internal successors, (6648), 24 states have internal predecessors, (6648), 0 states have call successors, (0), 0 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 15:28:03,582 INFO L175 Difference]: Start difference. First operand has 471 places, 2364 transitions, 56781 flow. Second operand 23 states and 2053 transitions. [2023-08-24 15:28:03,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 2611 transitions, 65952 flow [2023-08-24 15:28:10,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 2611 transitions, 60524 flow, removed 2619 selfloop flow, removed 6 redundant places. [2023-08-24 15:28:10,821 INFO L231 Difference]: Finished difference. Result has 497 places, 2406 transitions, 53707 flow [2023-08-24 15:28:10,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=51483, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=53707, PETRI_PLACES=497, PETRI_TRANSITIONS=2406} [2023-08-24 15:28:10,822 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 467 predicate places. [2023-08-24 15:28:10,822 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 2406 transitions, 53707 flow [2023-08-24 15:28:10,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 15:28:10,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:28:10,823 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] [2023-08-24 15:28:10,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-24 15:28:11,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-24 15:28:11,023 INFO L420 AbstractCegarLoop]: === Iteration 63 === 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 15:28:11,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:28:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash -871514669, now seen corresponding path program 22 times [2023-08-24 15:28:11,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:28:11,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120627647] [2023-08-24 15:28:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:28:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:28:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:28:11,611 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 15:28:11,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:28:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120627647] [2023-08-24 15:28:11,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120627647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:28:11,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920212981] [2023-08-24 15:28:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:28:11,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:28:11,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:28:11,613 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:28:11,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-24 15:28:11,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:28:11,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:28:11,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-24 15:28:11,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:28:12,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:28:12,173 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:28:12,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2023-08-24 15:28:12,223 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 15:28:12,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:28:12,821 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:28:12,821 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 44 treesize of output 47 [2023-08-24 15:28:12,871 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 15:28:12,871 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 43 treesize of output 18 [2023-08-24 15:28:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:28:13,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920212981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:28:13,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:28:13,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 36 [2023-08-24 15:28:13,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136059276] [2023-08-24 15:28:13,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:28:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 15:28:13,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:28:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 15:28:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 15:28:13,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:28:13,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 2406 transitions, 53707 flow. Second operand has 38 states, 38 states have (on average 80.92105263157895) internal successors, (3075), 38 states have internal predecessors, (3075), 0 states have call successors, (0), 0 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 15:28:13,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:28:13,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:28:13,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:28:21,934 INFO L124 PetriNetUnfolderBase]: 11819/17094 cut-off events. [2023-08-24 15:28:21,935 INFO L125 PetriNetUnfolderBase]: For 516333/516333 co-relation queries the response was YES. [2023-08-24 15:28:22,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193208 conditions, 17094 events. 11819/17094 cut-off events. For 516333/516333 co-relation queries the response was YES. Maximal size of possible extension queue 877. Compared 99140 event pairs, 1013 based on Foata normal form. 1/17095 useless extension candidates. Maximal degree in co-relation 193010. Up to 13654 conditions per place. [2023-08-24 15:28:22,287 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 1789 selfloop transitions, 966 changer transitions 7/2762 dead transitions. [2023-08-24 15:28:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2762 transitions, 65658 flow [2023-08-24 15:28:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:28:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:28:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1674 transitions. [2023-08-24 15:28:22,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3180695420862626 [2023-08-24 15:28:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1674 transitions. [2023-08-24 15:28:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1674 transitions. [2023-08-24 15:28:22,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:28:22,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1674 transitions. [2023-08-24 15:28:22,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 88.10526315789474) internal successors, (1674), 19 states have internal predecessors, (1674), 0 states have call successors, (0), 0 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 15:28:22,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 277.0) internal successors, (5540), 20 states have internal predecessors, (5540), 0 states have call successors, (0), 0 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 15:28:22,293 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 277.0) internal successors, (5540), 20 states have internal predecessors, (5540), 0 states have call successors, (0), 0 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 15:28:22,293 INFO L175 Difference]: Start difference. First operand has 497 places, 2406 transitions, 53707 flow. Second operand 19 states and 1674 transitions. [2023-08-24 15:28:22,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 2762 transitions, 65658 flow [2023-08-24 15:28:28,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 2762 transitions, 64737 flow, removed 114 selfloop flow, removed 13 redundant places. [2023-08-24 15:28:28,653 INFO L231 Difference]: Finished difference. Result has 509 places, 2556 transitions, 58985 flow [2023-08-24 15:28:28,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=52796, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=58985, PETRI_PLACES=509, PETRI_TRANSITIONS=2556} [2023-08-24 15:28:28,654 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 479 predicate places. [2023-08-24 15:28:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 2556 transitions, 58985 flow [2023-08-24 15:28:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 80.92105263157895) internal successors, (3075), 38 states have internal predecessors, (3075), 0 states have call successors, (0), 0 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 15:28:28,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:28:28,655 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] [2023-08-24 15:28:28,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-24 15:28:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-24 15:28:28,860 INFO L420 AbstractCegarLoop]: === Iteration 64 === 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 15:28:28,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:28:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1554799913, now seen corresponding path program 23 times [2023-08-24 15:28:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:28:28,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788818201] [2023-08-24 15:28:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:28:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:28:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:28:29,384 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 15:28:29,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:28:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788818201] [2023-08-24 15:28:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788818201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:28:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511611137] [2023-08-24 15:28:29,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:28:29,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:28:29,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:28:29,385 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:28:29,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-24 15:28:29,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:28:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:28:29,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-24 15:28:29,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:28:29,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:28:29,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:28:29,893 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:28:29,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 42 [2023-08-24 15:28:29,971 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 15:28:29,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:28:30,291 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:28:30,291 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 43 treesize of output 46 [2023-08-24 15:28:30,337 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 15:28:30,338 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 44 treesize of output 19 [2023-08-24 15:28:30,536 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 15:28:30,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511611137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:28:30,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:28:30,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 29 [2023-08-24 15:28:30,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408980864] [2023-08-24 15:28:30,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:28:30,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 15:28:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:28:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 15:28:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-08-24 15:28:30,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 277 [2023-08-24 15:28:30,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 2556 transitions, 58985 flow. Second operand has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 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 15:28:30,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:28:30,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 277 [2023-08-24 15:28:30,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:28:40,009 INFO L124 PetriNetUnfolderBase]: 12056/17455 cut-off events. [2023-08-24 15:28:40,009 INFO L125 PetriNetUnfolderBase]: For 572524/572839 co-relation queries the response was YES. [2023-08-24 15:28:40,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202807 conditions, 17455 events. 12056/17455 cut-off events. For 572524/572839 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 102431 event pairs, 1098 based on Foata normal form. 124/17532 useless extension candidates. Maximal degree in co-relation 202601. Up to 13444 conditions per place. [2023-08-24 15:28:40,248 INFO L140 encePairwiseOnDemand]: 265/277 looper letters, 1743 selfloop transitions, 1043 changer transitions 5/2852 dead transitions. [2023-08-24 15:28:40,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 2852 transitions, 70437 flow [2023-08-24 15:28:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 15:28:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 15:28:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1634 transitions. [2023-08-24 15:28:40,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34699511573582503 [2023-08-24 15:28:40,249 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1634 transitions. [2023-08-24 15:28:40,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1634 transitions. [2023-08-24 15:28:40,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:28:40,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1634 transitions. [2023-08-24 15:28:40,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 96.11764705882354) internal successors, (1634), 17 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 15:28:40,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 277.0) internal successors, (4986), 18 states have internal predecessors, (4986), 0 states have call successors, (0), 0 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 15:28:40,253 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 277.0) internal successors, (4986), 18 states have internal predecessors, (4986), 0 states have call successors, (0), 0 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 15:28:40,253 INFO L175 Difference]: Start difference. First operand has 509 places, 2556 transitions, 58985 flow. Second operand 17 states and 1634 transitions. [2023-08-24 15:28:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 2852 transitions, 70437 flow [2023-08-24 15:28:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 2852 transitions, 69134 flow, removed 407 selfloop flow, removed 7 redundant places. [2023-08-24 15:28:46,940 INFO L231 Difference]: Finished difference. Result has 522 places, 2658 transitions, 63139 flow [2023-08-24 15:28:46,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=57893, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=63139, PETRI_PLACES=522, PETRI_TRANSITIONS=2658} [2023-08-24 15:28:46,941 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2023-08-24 15:28:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2658 transitions, 63139 flow [2023-08-24 15:28:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 89.0) internal successors, (2759), 31 states have internal predecessors, (2759), 0 states have call successors, (0), 0 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 15:28:46,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:28:46,942 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] [2023-08-24 15:28:46,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-24 15:28:47,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:28:47,147 INFO L420 AbstractCegarLoop]: === Iteration 65 === 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 15:28:47,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:28:47,147 INFO L85 PathProgramCache]: Analyzing trace with hash 418771449, now seen corresponding path program 10 times [2023-08-24 15:28:47,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:28:47,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304557349] [2023-08-24 15:28:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:28:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:28:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:28:47,625 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 15:28:47,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:28:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304557349] [2023-08-24 15:28:47,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304557349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:28:47,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794792872] [2023-08-24 15:28:47,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:28:47,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:28:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:28:47,626 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:28:47,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-24 15:28:47,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:28:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:28:47,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-24 15:28:47,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:28:48,122 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:28:48,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-24 15:28:48,193 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 15:28:48,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:28:48,406 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:28:48,406 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 38 treesize of output 54 [2023-08-24 15:28:48,685 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 15:28:48,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794792872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:28:48,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:28:48,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 15:28:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063237609] [2023-08-24 15:28:48,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:28:48,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 15:28:48,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:28:48,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 15:28:48,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 15:28:48,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:28:48,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2658 transitions, 63139 flow. Second operand has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 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 15:28:48,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:28:48,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:28:48,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:29:02,665 INFO L124 PetriNetUnfolderBase]: 14843/21468 cut-off events. [2023-08-24 15:29:02,665 INFO L125 PetriNetUnfolderBase]: For 768899/768899 co-relation queries the response was YES. [2023-08-24 15:29:02,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253975 conditions, 21468 events. 14843/21468 cut-off events. For 768899/768899 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 128981 event pairs, 1265 based on Foata normal form. 3/21471 useless extension candidates. Maximal degree in co-relation 253764. Up to 16022 conditions per place. [2023-08-24 15:29:02,990 INFO L140 encePairwiseOnDemand]: 261/277 looper letters, 2283 selfloop transitions, 1243 changer transitions 4/3530 dead transitions. [2023-08-24 15:29:02,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 3530 transitions, 89099 flow [2023-08-24 15:29:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 15:29:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 15:29:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3545 transitions. [2023-08-24 15:29:02,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31994584837545126 [2023-08-24 15:29:02,993 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3545 transitions. [2023-08-24 15:29:02,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3545 transitions. [2023-08-24 15:29:02,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:29:02,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3545 transitions. [2023-08-24 15:29:02,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 88.625) internal successors, (3545), 40 states have internal predecessors, (3545), 0 states have call successors, (0), 0 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 15:29:02,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 277.0) internal successors, (11357), 41 states have internal predecessors, (11357), 0 states have call successors, (0), 0 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 15:29:03,000 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 277.0) internal successors, (11357), 41 states have internal predecessors, (11357), 0 states have call successors, (0), 0 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 15:29:03,000 INFO L175 Difference]: Start difference. First operand has 522 places, 2658 transitions, 63139 flow. Second operand 40 states and 3545 transitions. [2023-08-24 15:29:03,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 3530 transitions, 89099 flow [2023-08-24 15:29:13,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 3530 transitions, 87026 flow, removed 679 selfloop flow, removed 11 redundant places. [2023-08-24 15:29:13,889 INFO L231 Difference]: Finished difference. Result has 574 places, 3270 transitions, 81023 flow [2023-08-24 15:29:13,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=61592, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=81023, PETRI_PLACES=574, PETRI_TRANSITIONS=3270} [2023-08-24 15:29:13,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 544 predicate places. [2023-08-24 15:29:13,891 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 3270 transitions, 81023 flow [2023-08-24 15:29:13,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 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 15:29:13,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:29:13,891 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] [2023-08-24 15:29:13,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-24 15:29:14,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:29:14,096 INFO L420 AbstractCegarLoop]: === Iteration 66 === 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 15:29:14,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:29:14,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1095490319, now seen corresponding path program 11 times [2023-08-24 15:29:14,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:29:14,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364614104] [2023-08-24 15:29:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:29:14,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:29:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:29:14,601 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 15:29:14,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:29:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364614104] [2023-08-24 15:29:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364614104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:29:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110047088] [2023-08-24 15:29:14,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:29:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:29:14,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:29:14,604 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:29:14,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-24 15:29:14,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:29:14,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:29:14,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-24 15:29:14,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:29:15,050 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:29:15,052 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:29:15,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-08-24 15:29:15,070 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 15:29:15,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:29:15,393 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:29:15,393 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 39 treesize of output 47 [2023-08-24 15:29:15,437 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 15:29:15,437 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 21 treesize of output 12 [2023-08-24 15:29:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:29:15,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110047088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:29:15,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:29:15,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-08-24 15:29:15,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021999696] [2023-08-24 15:29:15,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:29:15,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:29:15,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:29:15,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:29:15,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2023-08-24 15:29:15,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 277 [2023-08-24 15:29:15,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 3270 transitions, 81023 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 15:29:15,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:29:15,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 277 [2023-08-24 15:29:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:29:30,970 INFO L124 PetriNetUnfolderBase]: 15130/21906 cut-off events. [2023-08-24 15:29:30,971 INFO L125 PetriNetUnfolderBase]: For 852317/852317 co-relation queries the response was YES. [2023-08-24 15:29:31,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269425 conditions, 21906 events. 15130/21906 cut-off events. For 852317/852317 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 132317 event pairs, 1509 based on Foata normal form. 2/21908 useless extension candidates. Maximal degree in co-relation 269189. Up to 19469 conditions per place. [2023-08-24 15:29:31,461 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 2811 selfloop transitions, 704 changer transitions 2/3517 dead transitions. [2023-08-24 15:29:31,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 3517 transitions, 92151 flow [2023-08-24 15:29:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 15:29:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 15:29:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2318 transitions. [2023-08-24 15:29:31,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218550402665926 [2023-08-24 15:29:31,463 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2318 transitions. [2023-08-24 15:29:31,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2318 transitions. [2023-08-24 15:29:31,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:29:31,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2318 transitions. [2023-08-24 15:29:31,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 89.15384615384616) internal successors, (2318), 26 states have internal predecessors, (2318), 0 states have call successors, (0), 0 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 15:29:31,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 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 15:29:31,468 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 277.0) internal successors, (7479), 27 states have internal predecessors, (7479), 0 states have call successors, (0), 0 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 15:29:31,468 INFO L175 Difference]: Start difference. First operand has 574 places, 3270 transitions, 81023 flow. Second operand 26 states and 2318 transitions. [2023-08-24 15:29:31,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 3517 transitions, 92151 flow [2023-08-24 15:29:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 3517 transitions, 86308 flow, removed 2861 selfloop flow, removed 6 redundant places. [2023-08-24 15:29:46,727 INFO L231 Difference]: Finished difference. Result has 606 places, 3345 transitions, 78915 flow [2023-08-24 15:29:46,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=75348, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=78915, PETRI_PLACES=606, PETRI_TRANSITIONS=3345} [2023-08-24 15:29:46,729 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 576 predicate places. [2023-08-24 15:29:46,729 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 3345 transitions, 78915 flow [2023-08-24 15:29:46,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 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 15:29:46,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:29:46,729 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] [2023-08-24 15:29:46,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-24 15:29:46,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-24 15:29:46,937 INFO L420 AbstractCegarLoop]: === Iteration 67 === 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 15:29:46,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:29:46,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1273127991, now seen corresponding path program 22 times [2023-08-24 15:29:46,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:29:46,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950714141] [2023-08-24 15:29:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:29:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:29:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:29:47,403 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 15:29:47,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:29:47,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950714141] [2023-08-24 15:29:47,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950714141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:29:47,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086303551] [2023-08-24 15:29:47,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:29:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:29:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:29:47,405 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:29:47,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-24 15:29:47,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:29:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:29:47,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 15:29:47,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:29:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:29:47,809 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 20 treesize of output 20 [2023-08-24 15:29:47,996 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:29:47,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-24 15:29:48,050 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 15:29:48,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:29:48,389 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:29:48,389 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 82 treesize of output 80 [2023-08-24 15:29:48,396 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:29:48,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-24 15:29:48,726 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 15:29:48,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086303551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:29:48,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:29:48,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2023-08-24 15:29:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467465040] [2023-08-24 15:29:48,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:29:48,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 15:29:48,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:29:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 15:29:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1331, Unknown=2, NotChecked=0, Total=1482 [2023-08-24 15:29:48,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:29:48,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 3345 transitions, 78915 flow. Second operand has 39 states, 39 states have (on average 76.7948717948718) internal successors, (2995), 39 states have internal predecessors, (2995), 0 states have call successors, (0), 0 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 15:29:48,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:29:48,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:29:48,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:30:08,703 INFO L124 PetriNetUnfolderBase]: 17880/25894 cut-off events. [2023-08-24 15:30:08,704 INFO L125 PetriNetUnfolderBase]: For 963208/963208 co-relation queries the response was YES. [2023-08-24 15:30:09,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317155 conditions, 25894 events. 17880/25894 cut-off events. For 963208/963208 co-relation queries the response was YES. Maximal size of possible extension queue 1209. Compared 160316 event pairs, 1698 based on Foata normal form. 2/25896 useless extension candidates. Maximal degree in co-relation 316906. Up to 21221 conditions per place. [2023-08-24 15:30:09,190 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 3210 selfloop transitions, 1268 changer transitions 1/4479 dead transitions. [2023-08-24 15:30:09,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 4479 transitions, 117644 flow [2023-08-24 15:30:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 15:30:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 15:30:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3833 transitions. [2023-08-24 15:30:09,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3008161983989954 [2023-08-24 15:30:09,193 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3833 transitions. [2023-08-24 15:30:09,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3833 transitions. [2023-08-24 15:30:09,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:30:09,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3833 transitions. [2023-08-24 15:30:09,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 83.32608695652173) internal successors, (3833), 46 states have internal predecessors, (3833), 0 states have call successors, (0), 0 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 15:30:09,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 277.0) internal successors, (13019), 47 states have internal predecessors, (13019), 0 states have call successors, (0), 0 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 15:30:09,201 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 277.0) internal successors, (13019), 47 states have internal predecessors, (13019), 0 states have call successors, (0), 0 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 15:30:09,201 INFO L175 Difference]: Start difference. First operand has 606 places, 3345 transitions, 78915 flow. Second operand 46 states and 3833 transitions. [2023-08-24 15:30:09,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 4479 transitions, 117644 flow [2023-08-24 15:30:27,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 4479 transitions, 116297 flow, removed 284 selfloop flow, removed 11 redundant places. [2023-08-24 15:30:27,877 INFO L231 Difference]: Finished difference. Result has 666 places, 4029 transitions, 104182 flow [2023-08-24 15:30:27,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=77977, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=655, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=104182, PETRI_PLACES=666, PETRI_TRANSITIONS=4029} [2023-08-24 15:30:27,879 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 636 predicate places. [2023-08-24 15:30:27,879 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 4029 transitions, 104182 flow [2023-08-24 15:30:27,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 76.7948717948718) internal successors, (2995), 39 states have internal predecessors, (2995), 0 states have call successors, (0), 0 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 15:30:27,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:30:27,880 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] [2023-08-24 15:30:27,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-24 15:30:28,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-24 15:30:28,080 INFO L420 AbstractCegarLoop]: === Iteration 68 === 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 15:30:28,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:30:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1905970919, now seen corresponding path program 23 times [2023-08-24 15:30:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:30:28,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834814259] [2023-08-24 15:30:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:30:28,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:30:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:30:28,544 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 15:30:28,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:30:28,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834814259] [2023-08-24 15:30:28,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834814259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:30:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922754762] [2023-08-24 15:30:28,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:30:28,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:30:28,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:30:28,545 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:30:28,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-24 15:30:28,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:30:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:30:28,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 15:30:28,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:30:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:30:28,944 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 27 treesize of output 25 [2023-08-24 15:30:29,004 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:30:29,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-08-24 15:30:29,009 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 15:30:29,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:30:29,039 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3041 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3041) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-08-24 15:30:29,096 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3041 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3041) c_~A~0.base) (+ c_~A~0.offset 4)) c_~res2~0) (+ (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0)))) is different from false [2023-08-24 15:30:29,114 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:30:29,114 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 80 treesize of output 66 [2023-08-24 15:30:29,117 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 17 treesize of output 13 [2023-08-24 15:30:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-24 15:30:29,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922754762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:30:29,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:30:29,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-08-24 15:30:29,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898820688] [2023-08-24 15:30:29,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:30:29,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 15:30:29,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:30:29,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 15:30:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=8, NotChecked=106, Total=870 [2023-08-24 15:30:29,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 277 [2023-08-24 15:30:29,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 4029 transitions, 104182 flow. Second operand has 30 states, 30 states have (on average 83.13333333333334) internal successors, (2494), 30 states have internal predecessors, (2494), 0 states have call successors, (0), 0 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 15:30:29,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:30:29,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 277 [2023-08-24 15:30:29,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:30:49,516 INFO L124 PetriNetUnfolderBase]: 18216/26340 cut-off events. [2023-08-24 15:30:49,516 INFO L125 PetriNetUnfolderBase]: For 1149503/1151031 co-relation queries the response was YES. [2023-08-24 15:30:49,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339929 conditions, 26340 events. 18216/26340 cut-off events. For 1149503/1151031 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 164945 event pairs, 1363 based on Foata normal form. 754/26784 useless extension candidates. Maximal degree in co-relation 339654. Up to 19973 conditions per place. [2023-08-24 15:30:50,111 INFO L140 encePairwiseOnDemand]: 266/277 looper letters, 2716 selfloop transitions, 1430 changer transitions 1/4303 dead transitions. [2023-08-24 15:30:50,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 4303 transitions, 119445 flow [2023-08-24 15:30:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:30:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:30:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1359 transitions. [2023-08-24 15:30:50,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3270758122743682 [2023-08-24 15:30:50,113 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1359 transitions. [2023-08-24 15:30:50,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1359 transitions. [2023-08-24 15:30:50,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:30:50,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1359 transitions. [2023-08-24 15:30:50,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 90.6) internal successors, (1359), 15 states have internal predecessors, (1359), 0 states have call successors, (0), 0 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 15:30:50,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 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 15:30:50,116 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 277.0) internal successors, (4432), 16 states have internal predecessors, (4432), 0 states have call successors, (0), 0 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 15:30:50,116 INFO L175 Difference]: Start difference. First operand has 666 places, 4029 transitions, 104182 flow. Second operand 15 states and 1359 transitions. [2023-08-24 15:30:50,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 4303 transitions, 119445 flow [2023-08-24 15:31:14,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 4303 transitions, 115252 flow, removed 2058 selfloop flow, removed 8 redundant places. [2023-08-24 15:31:14,176 INFO L231 Difference]: Finished difference. Result has 676 places, 4150 transitions, 108385 flow [2023-08-24 15:31:14,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=100287, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=108385, PETRI_PLACES=676, PETRI_TRANSITIONS=4150} [2023-08-24 15:31:14,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 646 predicate places. [2023-08-24 15:31:14,179 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 4150 transitions, 108385 flow [2023-08-24 15:31:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.13333333333334) internal successors, (2494), 30 states have internal predecessors, (2494), 0 states have call successors, (0), 0 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 15:31:14,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:31:14,179 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] [2023-08-24 15:31:14,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-24 15:31:14,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:31:14,380 INFO L420 AbstractCegarLoop]: === Iteration 69 === 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 15:31:14,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:31:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1903220797, now seen corresponding path program 12 times [2023-08-24 15:31:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:31:14,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401051667] [2023-08-24 15:31:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:31:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:31:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:31:14,881 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 15:31:14,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:31:14,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401051667] [2023-08-24 15:31:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401051667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:31:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146761151] [2023-08-24 15:31:14,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:31:14,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:31:14,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:31:14,882 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:31:14,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-24 15:31:15,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:31:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:31:15,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 88 conjunts are in the unsatisfiable core [2023-08-24 15:31:15,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:31:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:31:15,305 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 20 treesize of output 20 [2023-08-24 15:31:15,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:31:15,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-24 15:31:15,505 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 15:31:15,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:31:15,797 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_3090 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3090) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) c_~res2~0 (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))))) (+ c_~res1~0 1)) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|))) (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_3090 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (<= c_~res1~0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3090) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) c_~res2~0 (select .cse1 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4)))))) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|)))) is different from false [2023-08-24 15:31:15,832 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)))) (and (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_3090 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3090) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) c_~res2~0 (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))))) (+ .cse1 c_~res1~0 1)) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|))) (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_3090 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|) (<= (+ .cse1 c_~res1~0) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3090) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) c_~res2~0 (select .cse2 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4)))))))))) is different from false [2023-08-24 15:31:15,856 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:31:15,856 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 82 treesize of output 80 [2023-08-24 15:31:15,864 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:31:15,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-24 15:31:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:31:16,002 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:31:16,002 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 47 [2023-08-24 15:31:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 15:31:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146761151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:31:16,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:31:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-24 15:31:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952857383] [2023-08-24 15:31:16,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:31:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:31:16,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:31:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:31:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=998, Unknown=2, NotChecked=130, Total=1260 [2023-08-24 15:31:16,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:31:16,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 4150 transitions, 108385 flow. Second operand has 36 states, 36 states have (on average 76.83333333333333) internal successors, (2766), 36 states have internal predecessors, (2766), 0 states have call successors, (0), 0 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 15:31:16,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:31:16,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:31:16,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:31:39,856 INFO L124 PetriNetUnfolderBase]: 18896/27383 cut-off events. [2023-08-24 15:31:39,857 INFO L125 PetriNetUnfolderBase]: For 1121316/1121316 co-relation queries the response was YES. [2023-08-24 15:31:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351991 conditions, 27383 events. 18896/27383 cut-off events. For 1121316/1121316 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 171175 event pairs, 2018 based on Foata normal form. 2/27385 useless extension candidates. Maximal degree in co-relation 351714. Up to 24060 conditions per place. [2023-08-24 15:31:40,460 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 3578 selfloop transitions, 782 changer transitions 23/4383 dead transitions. [2023-08-24 15:31:40,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 692 places, 4383 transitions, 122290 flow [2023-08-24 15:31:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 15:31:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 15:31:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1458 transitions. [2023-08-24 15:31:40,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096198768315991 [2023-08-24 15:31:40,461 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1458 transitions. [2023-08-24 15:31:40,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1458 transitions. [2023-08-24 15:31:40,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:31:40,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1458 transitions. [2023-08-24 15:31:40,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 85.76470588235294) internal successors, (1458), 17 states have internal predecessors, (1458), 0 states have call successors, (0), 0 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 15:31:40,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 277.0) internal successors, (4986), 18 states have internal predecessors, (4986), 0 states have call successors, (0), 0 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 15:31:40,464 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 277.0) internal successors, (4986), 18 states have internal predecessors, (4986), 0 states have call successors, (0), 0 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 15:31:40,465 INFO L175 Difference]: Start difference. First operand has 676 places, 4150 transitions, 108385 flow. Second operand 17 states and 1458 transitions. [2023-08-24 15:31:40,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 692 places, 4383 transitions, 122290 flow [2023-08-24 15:32:07,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 4383 transitions, 120287 flow, removed 620 selfloop flow, removed 10 redundant places. [2023-08-24 15:32:07,607 INFO L231 Difference]: Finished difference. Result has 688 places, 4195 transitions, 110444 flow [2023-08-24 15:32:07,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=106394, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=740, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=110444, PETRI_PLACES=688, PETRI_TRANSITIONS=4195} [2023-08-24 15:32:07,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 658 predicate places. [2023-08-24 15:32:07,609 INFO L495 AbstractCegarLoop]: Abstraction has has 688 places, 4195 transitions, 110444 flow [2023-08-24 15:32:07,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.83333333333333) internal successors, (2766), 36 states have internal predecessors, (2766), 0 states have call successors, (0), 0 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 15:32:07,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:32:07,610 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] [2023-08-24 15:32:07,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-24 15:32:07,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-08-24 15:32:07,810 INFO L420 AbstractCegarLoop]: === Iteration 70 === 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 15:32:07,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:32:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2025997497, now seen corresponding path program 13 times [2023-08-24 15:32:07,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:32:07,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304577729] [2023-08-24 15:32:07,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:32:07,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:32:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:32:08,332 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 15:32:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:32:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304577729] [2023-08-24 15:32:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304577729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:32:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398797072] [2023-08-24 15:32:08,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:32:08,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:32:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:32:08,334 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:32:08,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-24 15:32:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:32:08,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 85 conjunts are in the unsatisfiable core [2023-08-24 15:32:08,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:32:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:32:08,810 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 27 treesize of output 25 [2023-08-24 15:32:08,902 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:32:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:32:08,905 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:32:08,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-08-24 15:32:08,925 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 15:32:08,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:32:09,168 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((|v_thread3Thread1of1ForFork0_~i~2#1_274| Int) (v_ArrVal_3139 (Array Int Int))) (or (<= c_~N~0 |v_thread3Thread1of1ForFork0_~i~2#1_274|) (<= c_~res1~0 (+ .cse0 c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3139) c_~A~0.base) (+ c_~A~0.offset (* |v_thread3Thread1of1ForFork0_~i~2#1_274| 4))))) (< |v_thread3Thread1of1ForFork0_~i~2#1_274| 1))) (forall ((|v_thread3Thread1of1ForFork0_~i~2#1_274| Int) (v_ArrVal_3139 (Array Int Int))) (or (<= c_~N~0 |v_thread3Thread1of1ForFork0_~i~2#1_274|) (< (+ .cse0 c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3139) c_~A~0.base) (+ c_~A~0.offset (* |v_thread3Thread1of1ForFork0_~i~2#1_274| 4)))) (+ c_~res1~0 1)) (< |v_thread3Thread1of1ForFork0_~i~2#1_274| 1))))) is different from false [2023-08-24 15:32:09,299 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:32:09,299 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 86 treesize of output 72 [2023-08-24 15:32:09,303 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 20 treesize of output 14 [2023-08-24 15:32:09,377 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:32:09,389 INFO L322 Elim1Store]: treesize reduction 36, result has 20.0 percent of original size [2023-08-24 15:32:09,389 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 38 treesize of output 18 [2023-08-24 15:32:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 15:32:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398797072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:32:09,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:32:09,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-24 15:32:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185959995] [2023-08-24 15:32:09,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:32:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:32:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:32:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:32:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1057, Unknown=6, NotChecked=66, Total=1260 [2023-08-24 15:32:09,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:32:09,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 4195 transitions, 110444 flow. Second operand has 36 states, 36 states have (on average 76.83333333333333) internal successors, (2766), 36 states have internal predecessors, (2766), 0 states have call successors, (0), 0 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 15:32:09,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:32:09,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:32:09,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:32:34,116 INFO L124 PetriNetUnfolderBase]: 19350/28092 cut-off events. [2023-08-24 15:32:34,116 INFO L125 PetriNetUnfolderBase]: For 1166581/1166581 co-relation queries the response was YES. [2023-08-24 15:32:34,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363003 conditions, 28092 events. 19350/28092 cut-off events. For 1166581/1166581 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 176672 event pairs, 2006 based on Foata normal form. 3/28095 useless extension candidates. Maximal degree in co-relation 362720. Up to 24090 conditions per place. [2023-08-24 15:32:34,809 INFO L140 encePairwiseOnDemand]: 264/277 looper letters, 3610 selfloop transitions, 847 changer transitions 3/4460 dead transitions. [2023-08-24 15:32:34,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 706 places, 4460 transitions, 125031 flow [2023-08-24 15:32:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:32:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:32:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1629 transitions. [2023-08-24 15:32:34,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30951928557856734 [2023-08-24 15:32:34,811 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1629 transitions. [2023-08-24 15:32:34,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1629 transitions. [2023-08-24 15:32:34,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:32:34,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1629 transitions. [2023-08-24 15:32:34,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.73684210526316) internal successors, (1629), 19 states have internal predecessors, (1629), 0 states have call successors, (0), 0 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 15:32:34,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 277.0) internal successors, (5540), 20 states have internal predecessors, (5540), 0 states have call successors, (0), 0 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 15:32:34,815 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 277.0) internal successors, (5540), 20 states have internal predecessors, (5540), 0 states have call successors, (0), 0 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 15:32:34,815 INFO L175 Difference]: Start difference. First operand has 688 places, 4195 transitions, 110444 flow. Second operand 19 states and 1629 transitions. [2023-08-24 15:32:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 706 places, 4460 transitions, 125031 flow [2023-08-24 15:33:01,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 4460 transitions, 123120 flow, removed 695 selfloop flow, removed 8 redundant places. [2023-08-24 15:33:01,516 INFO L231 Difference]: Finished difference. Result has 707 places, 4255 transitions, 113120 flow [2023-08-24 15:33:01,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=108693, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=113120, PETRI_PLACES=707, PETRI_TRANSITIONS=4255} [2023-08-24 15:33:01,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 677 predicate places. [2023-08-24 15:33:01,519 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 4255 transitions, 113120 flow [2023-08-24 15:33:01,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.83333333333333) internal successors, (2766), 36 states have internal predecessors, (2766), 0 states have call successors, (0), 0 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 15:33:01,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:33:01,519 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] [2023-08-24 15:33:01,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-24 15:33:01,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-24 15:33:01,720 INFO L420 AbstractCegarLoop]: === Iteration 71 === 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 15:33:01,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:33:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1252072981, now seen corresponding path program 24 times [2023-08-24 15:33:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:33:01,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327672197] [2023-08-24 15:33:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:33:01,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:33:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:33:02,418 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 15:33:02,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:33:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327672197] [2023-08-24 15:33:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327672197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:33:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612092409] [2023-08-24 15:33:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:33:02,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:33:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:33:02,420 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:33:02,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-24 15:33:02,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:33:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:33:02,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-24 15:33:02,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:33:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:33:02,921 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 20 treesize of output 20 [2023-08-24 15:33:03,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:33:03,065 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:33:03,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2023-08-24 15:33:03,121 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 15:33:03,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:33:03,664 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:33:03,664 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 92 treesize of output 77 [2023-08-24 15:33:03,669 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:33:03,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2023-08-24 15:33:03,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:33:03,732 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 15:33:03,732 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 44 treesize of output 19 [2023-08-24 15:33:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:33:04,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612092409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:33:04,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:33:04,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 15:33:04,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926547679] [2023-08-24 15:33:04,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:33:04,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 15:33:04,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:33:04,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 15:33:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1557, Unknown=5, NotChecked=0, Total=1722 [2023-08-24 15:33:04,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:33:04,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 4255 transitions, 113120 flow. Second operand has 42 states, 42 states have (on average 76.64285714285714) internal successors, (3219), 42 states have internal predecessors, (3219), 0 states have call successors, (0), 0 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 15:33:04,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:33:04,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:33:04,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:33:28,845 INFO L124 PetriNetUnfolderBase]: 19630/28563 cut-off events. [2023-08-24 15:33:28,845 INFO L125 PetriNetUnfolderBase]: For 1199330/1199330 co-relation queries the response was YES. [2023-08-24 15:33:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371699 conditions, 28563 events. 19630/28563 cut-off events. For 1199330/1199330 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 181442 event pairs, 1888 based on Foata normal form. 1/28564 useless extension candidates. Maximal degree in co-relation 371406. Up to 22594 conditions per place. [2023-08-24 15:33:29,544 INFO L140 encePairwiseOnDemand]: 264/277 looper letters, 2939 selfloop transitions, 1587 changer transitions 7/4533 dead transitions. [2023-08-24 15:33:29,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 4533 transitions, 128240 flow [2023-08-24 15:33:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 15:33:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 15:33:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1513 transitions. [2023-08-24 15:33:29,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3034496590453269 [2023-08-24 15:33:29,546 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1513 transitions. [2023-08-24 15:33:29,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1513 transitions. [2023-08-24 15:33:29,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:33:29,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1513 transitions. [2023-08-24 15:33:29,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.05555555555556) internal successors, (1513), 18 states have internal predecessors, (1513), 0 states have call successors, (0), 0 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 15:33:29,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 0 states have call successors, (0), 0 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 15:33:29,549 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 277.0) internal successors, (5263), 19 states have internal predecessors, (5263), 0 states have call successors, (0), 0 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 15:33:29,549 INFO L175 Difference]: Start difference. First operand has 707 places, 4255 transitions, 113120 flow. Second operand 18 states and 1513 transitions. [2023-08-24 15:33:29,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 4533 transitions, 128240 flow [2023-08-24 15:33:57,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 716 places, 4533 transitions, 126788 flow, removed 461 selfloop flow, removed 8 redundant places. [2023-08-24 15:33:58,008 INFO L231 Difference]: Finished difference. Result has 722 places, 4330 transitions, 118197 flow [2023-08-24 15:33:58,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=111691, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=118197, PETRI_PLACES=722, PETRI_TRANSITIONS=4330} [2023-08-24 15:33:58,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 692 predicate places. [2023-08-24 15:33:58,010 INFO L495 AbstractCegarLoop]: Abstraction has has 722 places, 4330 transitions, 118197 flow [2023-08-24 15:33:58,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 76.64285714285714) internal successors, (3219), 42 states have internal predecessors, (3219), 0 states have call successors, (0), 0 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 15:33:58,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:33:58,011 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] [2023-08-24 15:33:58,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-24 15:33:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:33:58,213 INFO L420 AbstractCegarLoop]: === Iteration 72 === 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 15:33:58,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:33:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1753658667, now seen corresponding path program 14 times [2023-08-24 15:33:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:33:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196801398] [2023-08-24 15:33:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:33:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:33:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:33:58,797 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 15:33:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:33:58,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196801398] [2023-08-24 15:33:58,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196801398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:33:58,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215612505] [2023-08-24 15:33:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:33:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:33:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:33:58,799 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:33:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-24 15:33:58,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:33:58,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:33:58,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-24 15:33:58,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:33:59,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:33:59,169 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 20 treesize of output 20 [2023-08-24 15:33:59,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:33:59,291 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:33:59,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-08-24 15:33:59,323 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 15:33:59,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:33:59,615 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 15:33:59,616 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 82 treesize of output 72 [2023-08-24 15:33:59,623 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 15:33:59,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-08-24 15:33:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 15:33:59,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215612505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:33:59,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:33:59,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 34 [2023-08-24 15:33:59,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088231121] [2023-08-24 15:33:59,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:33:59,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:33:59,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:33:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:33:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1120, Unknown=6, NotChecked=0, Total=1260 [2023-08-24 15:33:59,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:33:59,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 722 places, 4330 transitions, 118197 flow. Second operand has 36 states, 36 states have (on average 76.77777777777777) internal successors, (2764), 36 states have internal predecessors, (2764), 0 states have call successors, (0), 0 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 15:33:59,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:33:59,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:33:59,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:34:31,151 INFO L124 PetriNetUnfolderBase]: 21476/31519 cut-off events. [2023-08-24 15:34:31,152 INFO L125 PetriNetUnfolderBase]: For 1341377/1341377 co-relation queries the response was YES. [2023-08-24 15:34:31,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411542 conditions, 31519 events. 21476/31519 cut-off events. For 1341377/1341377 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 207406 event pairs, 1796 based on Foata normal form. 1/31520 useless extension candidates. Maximal degree in co-relation 411242. Up to 23595 conditions per place. [2023-08-24 15:34:32,061 INFO L140 encePairwiseOnDemand]: 263/277 looper letters, 3229 selfloop transitions, 2040 changer transitions 8/5277 dead transitions. [2023-08-24 15:34:32,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 5277 transitions, 151486 flow [2023-08-24 15:34:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-24 15:34:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-24 15:34:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 4619 transitions. [2023-08-24 15:34:32,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29776946879834965 [2023-08-24 15:34:32,064 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 4619 transitions. [2023-08-24 15:34:32,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 4619 transitions. [2023-08-24 15:34:32,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:34:32,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 4619 transitions. [2023-08-24 15:34:32,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 82.48214285714286) internal successors, (4619), 56 states have internal predecessors, (4619), 0 states have call successors, (0), 0 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 15:34:32,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 277.0) internal successors, (15789), 57 states have internal predecessors, (15789), 0 states have call successors, (0), 0 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 15:34:32,184 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 277.0) internal successors, (15789), 57 states have internal predecessors, (15789), 0 states have call successors, (0), 0 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 15:34:32,185 INFO L175 Difference]: Start difference. First operand has 722 places, 4330 transitions, 118197 flow. Second operand 56 states and 4619 transitions. [2023-08-24 15:34:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 5277 transitions, 151486 flow [2023-08-24 15:35:04,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 5277 transitions, 149284 flow, removed 308 selfloop flow, removed 9 redundant places. [2023-08-24 15:35:04,714 INFO L231 Difference]: Finished difference. Result has 795 places, 4923 transitions, 140253 flow [2023-08-24 15:35:04,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=116193, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=140253, PETRI_PLACES=795, PETRI_TRANSITIONS=4923} [2023-08-24 15:35:04,716 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 765 predicate places. [2023-08-24 15:35:04,716 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 4923 transitions, 140253 flow [2023-08-24 15:35:04,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.77777777777777) internal successors, (2764), 36 states have internal predecessors, (2764), 0 states have call successors, (0), 0 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 15:35:04,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:35:04,716 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] [2023-08-24 15:35:04,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-24 15:35:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2023-08-24 15:35:04,917 INFO L420 AbstractCegarLoop]: === Iteration 73 === 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 15:35:04,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:35:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -355778047, now seen corresponding path program 15 times [2023-08-24 15:35:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:35:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510401290] [2023-08-24 15:35:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:35:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:35:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:35:05,405 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 15:35:05,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:35:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510401290] [2023-08-24 15:35:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510401290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:35:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513377513] [2023-08-24 15:35:05,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:35:05,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:35:05,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:35:05,406 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:35:05,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-24 15:35:05,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:35:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:35:05,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-24 15:35:05,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:35:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:35:05,894 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 20 treesize of output 20 [2023-08-24 15:35:06,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:35:06,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-24 15:35:06,104 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 15:35:06,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:35:08,255 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_3286 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3286) c_~A~0.base))) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))) (select .cse0 c_~A~0.offset))) c_~res1~0) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|))) is different from false [2023-08-24 15:35:10,275 WARN L839 $PredicateComparison]: unable to prove that (forall ((|thread3Thread1of1ForFork0_~i~2#1| Int) (v_ArrVal_3286 (Array Int Int))) (or (< (+ |thread3Thread1of1ForFork0_~i~2#1| 1) c_~N~0) (<= c_~N~0 |thread3Thread1of1ForFork0_~i~2#1|) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3286) c_~A~0.base))) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* |thread3Thread1of1ForFork0_~i~2#1| 4))) (select .cse0 c_~A~0.offset))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0)))) is different from false [2023-08-24 15:35:10,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:35:10,299 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 82 treesize of output 80 [2023-08-24 15:35:10,306 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:35:10,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2023-08-24 15:35:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 15:35:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513377513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:35:10,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:35:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-24 15:35:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603367814] [2023-08-24 15:35:10,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:35:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 15:35:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:35:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 15:35:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=998, Unknown=2, NotChecked=130, Total=1260 [2023-08-24 15:35:10,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:35:10,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 4923 transitions, 140253 flow. Second operand has 36 states, 36 states have (on average 76.83333333333333) internal successors, (2766), 36 states have internal predecessors, (2766), 0 states have call successors, (0), 0 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 15:35:10,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:35:10,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:35:10,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:35:44,655 INFO L124 PetriNetUnfolderBase]: 22646/33212 cut-off events. [2023-08-24 15:35:44,655 INFO L125 PetriNetUnfolderBase]: For 1549572/1549572 co-relation queries the response was YES. [2023-08-24 15:35:45,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450640 conditions, 33212 events. 22646/33212 cut-off events. For 1549572/1549572 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 219816 event pairs, 2526 based on Foata normal form. 2/33214 useless extension candidates. Maximal degree in co-relation 450313. Up to 28307 conditions per place. [2023-08-24 15:35:45,786 INFO L140 encePairwiseOnDemand]: 262/277 looper letters, 4120 selfloop transitions, 1207 changer transitions 3/5330 dead transitions. [2023-08-24 15:35:45,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 5330 transitions, 161704 flow [2023-08-24 15:35:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 15:35:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 15:35:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1865 transitions. [2023-08-24 15:35:45,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30603872661634396 [2023-08-24 15:35:45,787 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1865 transitions. [2023-08-24 15:35:45,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1865 transitions. [2023-08-24 15:35:45,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:35:45,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1865 transitions. [2023-08-24 15:35:45,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 84.77272727272727) internal successors, (1865), 22 states have internal predecessors, (1865), 0 states have call successors, (0), 0 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 15:35:45,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 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 15:35:45,791 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 277.0) internal successors, (6371), 23 states have internal predecessors, (6371), 0 states have call successors, (0), 0 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 15:35:45,791 INFO L175 Difference]: Start difference. First operand has 795 places, 4923 transitions, 140253 flow. Second operand 22 states and 1865 transitions. [2023-08-24 15:35:45,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 5330 transitions, 161704 flow [2023-08-24 15:36:26,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 802 places, 5330 transitions, 156623 flow, removed 1969 selfloop flow, removed 14 redundant places. [2023-08-24 15:36:27,078 INFO L231 Difference]: Finished difference. Result has 812 places, 5128 transitions, 146111 flow [2023-08-24 15:36:27,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=135840, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=146111, PETRI_PLACES=812, PETRI_TRANSITIONS=5128} [2023-08-24 15:36:27,080 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 782 predicate places. [2023-08-24 15:36:27,080 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 5128 transitions, 146111 flow [2023-08-24 15:36:27,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.83333333333333) internal successors, (2766), 36 states have internal predecessors, (2766), 0 states have call successors, (0), 0 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 15:36:27,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:36:27,080 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] [2023-08-24 15:36:27,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-24 15:36:27,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:36:27,281 INFO L420 AbstractCegarLoop]: === Iteration 74 === 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 15:36:27,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:36:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash -499594149, now seen corresponding path program 25 times [2023-08-24 15:36:27,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:36:27,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340170154] [2023-08-24 15:36:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:36:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:36:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:36:27,944 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 15:36:27,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:36:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340170154] [2023-08-24 15:36:27,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340170154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:36:27,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491294079] [2023-08-24 15:36:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:36:27,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:36:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:36:27,946 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:36:27,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-24 15:36:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:36:28,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-24 15:36:28,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:36:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:36:28,397 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 20 treesize of output 20 [2023-08-24 15:36:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 15:36:28,496 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:36:28,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2023-08-24 15:36:28,579 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 15:36:28,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:36:28,813 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_3335 (Array Int Int))) (or (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3335) c_~A~0.base)) (.cse1 (* ~M~0 4))) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ c_~res1~0 1)) (< (+ 2 ~M~0) c_~N~0) (<= c_~N~0 (+ ~M~0 1)))) (forall ((~M~0 Int) (v_ArrVal_3335 (Array Int Int))) (or (< (+ 2 ~M~0) c_~N~0) (<= c_~res1~0 (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3335) c_~A~0.base)) (.cse3 (* ~M~0 4))) (+ c_~res2~0 (select .cse2 (+ c_~A~0.offset .cse3 4)) (select .cse2 (+ c_~A~0.offset .cse3))))) (<= c_~N~0 (+ ~M~0 1))))) is different from false [2023-08-24 15:36:28,858 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)))) (and (forall ((~M~0 Int) (v_ArrVal_3335 (Array Int Int))) (or (<= (+ .cse0 c_~res1~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3335) c_~A~0.base)) (.cse2 (* ~M~0 4))) (+ c_~res2~0 (select .cse1 (+ c_~A~0.offset .cse2 4)) (select .cse1 (+ c_~A~0.offset .cse2))))) (< (+ 2 ~M~0) c_~N~0) (<= c_~N~0 (+ ~M~0 1)))) (forall ((~M~0 Int) (v_ArrVal_3335 (Array Int Int))) (or (< (+ 2 ~M~0) c_~N~0) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3335) c_~A~0.base)) (.cse4 (* ~M~0 4))) (+ c_~res2~0 (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)))) (+ .cse0 c_~res1~0 1)) (<= c_~N~0 (+ ~M~0 1)))))) is different from false [2023-08-24 15:36:28,880 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:36:28,880 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 92 treesize of output 77 [2023-08-24 15:36:28,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 15:36:28,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2023-08-24 15:36:28,944 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 15:36:28,955 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 15:36:28,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 19 [2023-08-24 15:36:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 15:36:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491294079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:36:29,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:36:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 36 [2023-08-24 15:36:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241579580] [2023-08-24 15:36:29,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:36:29,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 15:36:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:36:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 15:36:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1132, Unknown=2, NotChecked=138, Total=1406 [2023-08-24 15:36:29,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 277 [2023-08-24 15:36:29,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 5128 transitions, 146111 flow. Second operand has 38 states, 38 states have (on average 76.71052631578948) internal successors, (2915), 38 states have internal predecessors, (2915), 0 states have call successors, (0), 0 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 15:36:29,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:36:29,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 277 [2023-08-24 15:36:29,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:37:11,098 INFO L124 PetriNetUnfolderBase]: 23786/34986 cut-off events. [2023-08-24 15:37:11,098 INFO L125 PetriNetUnfolderBase]: For 1637874/1637874 co-relation queries the response was YES. [2023-08-24 15:37:12,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476116 conditions, 34986 events. 23786/34986 cut-off events. For 1637874/1637874 co-relation queries the response was YES. Maximal size of possible extension queue 1712. Compared 234774 event pairs, 2389 based on Foata normal form. 2/34988 useless extension candidates. Maximal degree in co-relation 475782. Up to 27117 conditions per place. [2023-08-24 15:37:12,487 INFO L140 encePairwiseOnDemand]: 261/277 looper letters, 3710 selfloop transitions, 2043 changer transitions 9/5762 dead transitions. [2023-08-24 15:37:12,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 860 places, 5762 transitions, 171954 flow [2023-08-24 15:37:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 15:37:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 15:37:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4086 transitions. [2023-08-24 15:37:12,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30103882708317986 [2023-08-24 15:37:12,491 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4086 transitions. [2023-08-24 15:37:12,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4086 transitions. [2023-08-24 15:37:12,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:37:12,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4086 transitions. [2023-08-24 15:37:12,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 83.38775510204081) internal successors, (4086), 49 states have internal predecessors, (4086), 0 states have call successors, (0), 0 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 15:37:12,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 277.0) internal successors, (13850), 50 states have internal predecessors, (13850), 0 states have call successors, (0), 0 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 15:37:12,499 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 277.0) internal successors, (13850), 50 states have internal predecessors, (13850), 0 states have call successors, (0), 0 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 15:37:12,499 INFO L175 Difference]: Start difference. First operand has 812 places, 5128 transitions, 146111 flow. Second operand 49 states and 4086 transitions. [2023-08-24 15:37:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 860 places, 5762 transitions, 171954 flow Received shutdown request... [2023-08-24 15:37:20,148 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 15:37:20,148 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 15:37:20,276 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 15:37:20,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-24 15:37:20,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:37:20,488 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 15:37:20,490 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 15:37:20,490 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 15:37:20,490 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 15:37:20,490 INFO L445 BasicCegarLoop]: Path program histogram: [25, 23, 15, 6, 1, 1, 1, 1, 1] [2023-08-24 15:37:20,492 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:37:20,492 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:37:20,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:37:20 BasicIcfg [2023-08-24 15:37:20,493 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:37:20,494 INFO L158 Benchmark]: Toolchain (without parser) took 802119.07ms. Allocated memory was 427.8MB in the beginning and 11.1GB in the end (delta: 10.6GB). Free memory was 403.9MB in the beginning and 8.7GB in the end (delta: -8.3GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2023-08-24 15:37:20,494 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 427.8MB. Free memory is still 404.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:37:20,494 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.97ms. Allocated memory is still 427.8MB. Free memory was 403.9MB in the beginning and 392.1MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 15:37:20,494 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.84ms. Allocated memory is still 427.8MB. Free memory was 392.1MB in the beginning and 390.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-24 15:37:20,494 INFO L158 Benchmark]: Boogie Preprocessor took 23.27ms. Allocated memory is still 427.8MB. Free memory was 390.0MB in the beginning and 388.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:37:20,494 INFO L158 Benchmark]: RCFGBuilder took 426.80ms. Allocated memory is still 427.8MB. Free memory was 387.9MB in the beginning and 399.4MB in the end (delta: -11.5MB). Peak memory consumption was 32.6MB. Max. memory is 16.0GB. [2023-08-24 15:37:20,494 INFO L158 Benchmark]: TraceAbstraction took 801469.18ms. Allocated memory was 427.8MB in the beginning and 11.1GB in the end (delta: 10.6GB). Free memory was 398.5MB in the beginning and 8.7GB in the end (delta: -8.3GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. [2023-08-24 15:37:20,495 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 427.8MB. Free memory is still 404.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 169.97ms. Allocated memory is still 427.8MB. Free memory was 403.9MB in the beginning and 392.1MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.84ms. Allocated memory is still 427.8MB. Free memory was 392.1MB in the beginning and 390.0MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.27ms. Allocated memory is still 427.8MB. Free memory was 390.0MB in the beginning and 388.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 426.80ms. Allocated memory is still 427.8MB. Free memory was 387.9MB in the beginning and 399.4MB in the end (delta: -11.5MB). Peak memory consumption was 32.6MB. Max. memory is 16.0GB. * TraceAbstraction took 801469.18ms. Allocated memory was 427.8MB in the beginning and 11.1GB in the end (delta: 10.6GB). Free memory was 398.5MB in the beginning and 8.7GB in the end (delta: -8.3GB). Peak memory consumption was 6.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 133 PlacesBefore, 30 PlacesAfterwards, 135 TransitionsBefore, 24 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 7 FixpointIterations, 70 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 129 TotalNumberOfCompositions, 1615 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1509, independent: 1489, independent conditional: 0, independent unconditional: 1489, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 802, independent: 792, independent conditional: 0, independent unconditional: 792, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1509, independent: 697, independent conditional: 0, independent unconditional: 697, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 802, unknown conditional: 0, unknown unconditional: 802] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 170 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 801.4s, OverallIterations: 74, TraceHistogramMax: 2, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 714.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 62 mSolverCounterUnknown, 9181 SdHoareTripleChecker+Valid, 33.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9181 mSDsluCounter, 4623 SdHoareTripleChecker+Invalid, 29.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3840 IncrementalHoareTripleChecker+Unchecked, 4173 mSDsCounter, 753 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65604 IncrementalHoareTripleChecker+Invalid, 70259 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 753 mSolverCounterUnsat, 450 mSDtfsCounter, 65604 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4488 GetRequests, 2270 SyntacticMatches, 150 SemanticMatches, 2068 ConstructedPredicates, 25 IntricatePredicates, 3 DeprecatedPredicates, 20281 ImplicationChecksByTransitivity, 51.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146111occurred in iteration=73, InterpolantAutomatonStates: 1106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 57.6s InterpolantComputationTime, 3449 NumberOfCodeBlocks, 3449 NumberOfCodeBlocksAsserted, 205 NumberOfCheckSat, 4918 ConstructedInterpolants, 187 QuantifiedInterpolants, 60314 SizeOfPredicates, 1197 NumberOfNonLiveVariables, 18837 ConjunctsInSsa, 3015 ConjunctsInUnsatCore, 214 InterpolantComputations, 9 PerfectInterpolantSequences, 287/1047 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown